APA (7th ed.) Zitazioa

Gore, A. (1993). Earth in the Balance: Ecology and the human spirit. Penguin Books.

Chicago Style (17th ed.) Zitazioa

Gore, Albert. Earth in the Balance: Ecology and the Human Spirit. New York: Penguin Books, 1993.

MLA (9th ed.) Zitazioa

Gore, Albert. Earth in the Balance: Ecology and the Human Spirit. Penguin Books, 1993.