APA (7th ed.) Citation

Vien, N. K. (1970). 25 years of health work. [s.n.].

Chicago Style (17th ed.) Citation

Vien, Nguyen Khac. 25 Years of Health Work. Hanoi: [s.n.], 1970.

MLA (9th ed.) Citation

Vien, Nguyen Khac. 25 Years of Health Work. [s.n.], 1970.