APA (7th ed.) Citation

Sidgwick, H. (1901). The principles of political economy (3d ed.). Macmillan.

Chicago Style (17th ed.) Citation

Sidgwick, Henry. The Principles of Political Economy. 3d ed. London ; New York: Macmillan, 1901.

MLA (9th ed.) Citation

Sidgwick, Henry. The Principles of Political Economy. 3d ed. Macmillan, 1901.