Power, J. (1968). How life begins: The exciting story of human and animal birth. Simon and Schuster.
Citazione stile Chigago Style (17a edizione)Power, Jules. How Life Begins: The Exciting Story of Human and Animal Birth. New York: Simon and Schuster, 1968.
Citatione MLA (9a ed.)Power, Jules. How Life Begins: The Exciting Story of Human and Animal Birth. Simon and Schuster, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.