Sumner, G. L. (1949). The toastmaster' s guide: Secrets to success at the speakers' table. New York: Blue Ribbon Books.
Style de citation ChicagoSumner, G. Lynn. The Toastmaster' S Guide: Secrets to Success At the Speakers' Table. New York: Blue Ribbon Books, 1949.
Style de citation MLASumner, G. Lynn. The Toastmaster' S Guide: Secrets to Success At the Speakers' Table. New York: Blue Ribbon Books, 1949.
Attention : ces citations peuvent ne pas être correctes à 100%.