Cita APA (7a ed.)

Marshall Alfred. (1920). Principles of economics: An introductory volume (8th ed.). Macmillan.

Cita Chicago Style (17a ed.)

Marshall Alfred. Principles of Economics: An Introductory Volume. 8th ed. London: Macmillan, 1920.

Cita MLA (9a ed.)

Marshall Alfred. Principles of Economics: An Introductory Volume. 8th ed. Macmillan, 1920.