Headley, Robert, Rath Chim and Ok Soeun (2000), Modern Cambodian-English Dictionary, dp Dunwoody Press, Kensington, Maryland, U.S.A.

Headley, Robert K., Jr. (1977). Cambodian-English English-Cambodian Dictionary. Washington, Catholic University of American Press, 2 volumes.

Huffman, F. E and Im Proum (1977). Cambodian Literary Reader and Glossary. (Yale Linguistic series), New Haven London, Yale University Press.

Huffman, F. E. and Im Proum (1977). Cambodian-English Glossary. (Yale Linguistic series), New Haven London, Yale University Press.

Huffman, F. E. and Im Proum (1978). English-Khmer Dictionary. (Yale Linguistic series), New Haven London, Yale University Press.

Jacob, Judith M., (1974). A concise Cambodian-English dictionary. London, New York, Oxford University Press.

Kem Sos, Lim Hak Kheang and Madeline E. Ehrman (1990). Cambodian-English, English-Cambodian Dictionary. Foreign Service Institute basic course series.

Khin Sok (1999), La Grammaire du Khmer Modern, Éditions YOU-FENG, Librairie Éditeur.

Khin Sok (2000), Manuel de Khmer.  Volume 1, Éditions YOU-FENG, Librairie Éditeur.

Michel Rethy Antelme and Hélène Suppya Bru-Nut ( 2001).  Dictionaire Français-Khmer. Langues Mondes L'Asiathèques.

Smyth, David and Tran Kien (1994). Practical Cambodian Dictionary, English-Cambodian, Cambodian-English. Rutland, VT: Charles E. Tuttle Co.

Gilbert, Richard and Sovandy Hang (2004). Cambodian for Beginners. Paiboon Publishing (Bangkok).

Huffman, Franklin E. (1970). Modern Spoken Cambodian (Yale Linguistic series), with the assistance of Chhom-Rak Thong Lambert and Im Proum, New Haven and London, Yale University Press.

Huffman, Franklin E. (1970). Cambodian System of Writing and Beginning Reader (Yale Linguistic series), with the assistance of Charan Promchan and Chhom-Rak Thong Lambert, New Haven London, Yale University Press.

Huffman, Franklin E. (1972). Intermediate Cambodian Reader (Yale Linguistic series), with the assistance of Chhom-Rak Thong Lambert and Im Proum, New Haven and London, Yale University Press.

Im Proum (1989). My First Cambodian book: Volume 1 and Volume 2. Cambodian Books.

Jacob, Judith (1968, and 1996). Introduction to Cambodian. London, Oxford University Press.

Kem Sos, Lim Hak Kheang, and Ehrman, Madeline (1976). Contemporary Cambodian: Introduction. Foreign Service Institute basic course series.

Lim Hak Kheang and Purtle, Dale (1972). Contemporary Cambodian: Introduction. Edited, annotated, and supplemented by Madeline Ehrman and Kem Sos. Foreign Service Institute basic course series.

Northern Illinois University (NIU), Center for Southeast Asian Studies. Online beginning Khmer language and culture course. http://www.seasite.niu.edu/khmer

Noss, Richard B. and Im Proum (1966). Cambodian Basic Course with the assistance of Dale I. Purtle and Someth Suos. Foreign Service Institute basic course series.

Sak-Humphry, Chhany (2002). Communicating in Khmer: An Interactive Intermediate Level Khmer Course (CDs and Manuals 1 and 2). Honolulu, Hawaii.

Sak-Humphry, Chhany (2005). Communicating in Khmer: Reading and Writing for Beginners (CD and Manual). Honolulu, Hawaii.

Sak-Humphry, Chhany (2005). The Sdok Kak Thom Inscription. Honolulu, Hawaii.

Sak-Humphry, Chhany (2007). Communicating in Khmer: Third-Year (CDs and Manual 1 and 2). Honolulu, Hawaii.

Smith, Frank (c. 2004, 2008). Kamlang Phiasaa: Khmer Language Heritage Textbook. Self-published.

Smith, Frank (c. 2004, 2008). Muk Khmae: Khmer Beginning Textbook. Self-published.

Smyth, David (1995, 2008). Colloquial Cambodian: The Complete Language Course for Beginners. Routledge (UK).

Thompson, Karen (1959). Spoken Cambodian for Americans.

Tonkin, Derek (1962, 1991). The Cambodian Alphabet: How to Write the Khmer Language. Bangkok: Trasvin Publications.

In addition there are other resource materials such as the bilingual materials, textbooks from Cambodia and the instructor’s unpublished work. The video, films and tapes are also not listed here.