APA

Corwin E. S., . (1957). The President, office and powers: 1787-1948. New York: New York University Press.

Chicago

Corwin Edward Samuel, . 1957. The President, office and powers: 1787-1948. New York: New York University Press.

Harvard

Corwin E. S., . (1957). The President, office and powers: 1787-1948. New York: New York University Press.

MLA

Corwin Edward Samuel, . The President, office and powers: 1787-1948. New York: New York University Press. 1957.