1.
, . The American spirit. New York: Collier Books; 1962.
et . The American spirit. New York : Collier Books, 22 mai 1962
Beard Charles Austin & Beard Mary Ritter. (1962). The American spirit: A study of the idea of civilization in the United States. Collier Books.
Style de citation MLA (8e éd.)Beard Charles Austin et Beard Mary Ritter. The American Spirit: A Study of the Idea of Civilization in the United States. Collier Books, 1962.
Attention : ces citations peuvent ne pas être correctes à 100%.