Cita APA (7th ed.)

MARX, K. (1960). The essential left: Four classic texts on the principles of socialism. Unwin.

Cita Chicago (17th ed.)

MARX, Karl. The Essential Left: Four Classic Texts on the Principles of Socialism. London: Unwin, 1960.

Cita MLA (9th ed.)

MARX, Karl. The Essential Left: Four Classic Texts on the Principles of Socialism. Unwin, 1960.