Ward, B. (1972). Only the earth: The care and maintenance of a small planet. New York: Pengiun Books.
Style de citation ChicagoWard, Barbara. Only the Earth: The Care and Maintenance of a Small Planet. New York: Pengiun Books, 1972.
Style de citation MLAWard, Barbara. Only the Earth: The Care and Maintenance of a Small Planet. New York: Pengiun Books, 1972.
Attention : ces citations peuvent ne pas être correctes à 100%.