APA (7th ed.) Citation

Nguyen-dinh-Hoa. (1957). Speak Vietnamese. s.n.

Chicago Style (17th ed.) Citation

Nguyen-dinh-Hoa. Speak Vietnamese. Saigon: s.n, 1957.

MLA (9th ed.) Citation

Nguyen-dinh-Hoa. Speak Vietnamese. s.n, 1957.