Collier, R. (1931). The Robert Collier Letter Book. New York ; London: McGraw-Hill Book Company.
Style de citation ChicagoCollier, Robert. The Robert Collier Letter Book. New York ; London: McGraw-Hill Book Company, 1931.
Style de citation MLACollier, Robert. The Robert Collier Letter Book. New York ; London: McGraw-Hill Book Company, 1931.
Attention : ces citations peuvent ne pas être correctes à 100%.