APA

Beard C. A., . (1941). An economic interpretation of the Constitution of the United States. New York: Macmillan.

Chicago

Beard Charles Austin, . 1941. An economic interpretation of the Constitution of the United States. New York: Macmillan.

Harvard

Beard C. A., . (1941). An economic interpretation of the Constitution of the United States. New York: Macmillan.

MLA

Beard Charles Austin, . An economic interpretation of the Constitution of the United States. New York: Macmillan. 1941.