Cita APA (7th ed.)

Marshall, A. (1964). Principles of economics (8a. ed.). MacMillan.

Cita Chicago (17th ed.)

Marshall, Alfred. Principles of Economics. 8a. ed. Londres: MacMillan, 1964.

Cita MLA (9th ed.)

Marshall, Alfred. Principles of Economics. 8a. ed. MacMillan, 1964.