APA (7th ed.) Citation

Gide, C. (1922). First principles of political economy. G. G. Harrap.

Chicago Style (17th ed.) Citation

Gide, Charles. First Principles of Political Economy. London, Sydney: G. G. Harrap, 1922.

MLA (8th ed.) Citation

Gide, Charles. First Principles of Political Economy. G. G. Harrap, 1922.