APA (7th ed.) Citation

Marshall, A. (1920). Principles of economics (8th ed.). Macmillan and Co., Limited.

Chicago Style (17th ed.) Citation

Marshall, Alfred. Principles of Economics. 8th ed. London: Macmillan and Co., Limited, 1920.

MLA (9th ed.) Citation

Marshall, Alfred. Principles of Economics. 8th ed. Macmillan and Co., Limited, 1920.