APA (7th ed.) Citation

Marshall, A. (1891). Principles of economics (2. ed.). Macmillan and Co.

Chicago Style (17th ed.) Citation

Marshall, Alfred. Principles of Economics. 2. ed. London ; New York: Macmillan and Co, 1891.

MLA (9th ed.) Citation

Marshall, Alfred. Principles of Economics. 2. ed. Macmillan and Co, 1891.