APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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