APA (7th ed.) Citation

Duong Danh Rien. (1977). English grammar for the Vietnamese. Ungar.

Chicago Style (17th ed.) Citation

Duong Danh Rien. English Grammar for the Vietnamese. New York: Ungar, 1977.

MLA (9th ed.) Citation

Duong Danh Rien. English Grammar for the Vietnamese. Ungar, 1977.

Warning: These citations may not always be 100% accurate.