APA (7th ed.) Zitazioa

Power, J. (1968). How life begins: The exciting story of human and animal birth. Simon and Schuster.

Chicago Style (17th ed.) Zitazioa

Power, Jules. How Life Begins: The Exciting Story of Human and Animal Birth. New York: Simon and Schuster, 1968.

MLA (9th ed.) Zitazioa

Power, Jules. How Life Begins: The Exciting Story of Human and Animal Birth. Simon and Schuster, 1968.