Cita APA (7th ed.)

Marx, K., & Freedman, R. (1973). Marx on economics (Reprint.). Penguin.

Cita Chicago (17th ed.)

Marx, Karl, i Robert Freedman. Marx on Economics. Reprint. Harmondsworth: Penguin, 1973.

Cita MLA (9th ed.)

Marx, Karl, i Robert Freedman. Marx on Economics. Reprint. Penguin, 1973.