APA (7th ed.) Citation

Clubb, O. E. (1964). 20th century China. Columbia University Press.

Chicago Style (17th ed.) Citation

Clubb, O. Edmund. 20th Century China. New York [etc.]: Columbia University Press, 1964.

MLA (9th ed.) Citation

Clubb, O. Edmund. 20th Century China. Columbia University Press, 1964.