APA (7th ed.) Citation

Pigou, A. C. (1920). The economics of welfare (4th ed.). Macmillan and Co..

Chicago Style (17th ed.) Citation

Pigou, A. C. The Economics of Welfare. 4th ed. London: Macmillan and Co., 1920.

MLA (9th ed.) Citation

Pigou, A. C. The Economics of Welfare. 4th ed. Macmillan and Co., 1920.