David JoelD.J.SteinbergDavid JoelD.J. i inni, In Search of Southeast Asia, New York: Praeger Publishers, 1971, s. 415, OCLC247713615 [dostęp 2022-03-28], Cytat: Unlike the other non-Malay national languages of Southeast Asia, Cambodian has no tones.(ang.).
David JoelD.J.SteinbergDavid JoelD.J. i inni, In Search of Southeast Asia, New York: Praeger Publishers, 1971, s. 415, OCLC247713615 [dostęp 2022-03-28], Cytat: Unlike the other non-Malay national languages of Southeast Asia, Cambodian has no tones.(ang.).