APA (7th ed.) Citation

Pringle, J. M. D. (1939). China struggles for unity. Penguin Books.

Chicago Style (17th ed.) Citation

Pringle, John Martin Douglas. China Struggles for Unity. Harmondsworth, Middlesex, Eng.: Penguin Books, 1939.

MLA (9th ed.) Citation

Pringle, John Martin Douglas. China Struggles for Unity. Penguin Books, 1939.