APA (7th ed.) Citation

Jevons, W. S., & Black, R. D. C. (1970). The theory of political economy (2nd. ed.). Penguin.

Chicago Style (17th ed.) Citation

Jevons, William Stanley, and R. D. Collison Black. The Theory of Political Economy. 2nd. ed. Harmondsworth: Penguin, 1970.

MLA (8th ed.) Citation

Jevons, William Stanley, and R. D. Collison Black. The Theory of Political Economy. 2nd. ed. Penguin, 1970.