Cita APA (7a ed.)

Harrington, M. (1990). Socialism: Past and present. Penguin.

Cita Chicago Style (17a ed.)

Harrington, Michael. Socialism: Past and Present. New York: Penguin, 1990.

Cita MLA (9a ed.)

Harrington, Michael. Socialism: Past and Present. Penguin, 1990.