Cita APA

Willoughby, W. W. (1929). Constitutional law of the United States. New York: Baker,Voorhis.

Citación estilo Chicago

Willoughby, Westel Woodbury. Constitutional Law of the United States. New York: Baker,Voorhis, 1929.

Cita MLA

Willoughby, Westel Woodbury. Constitutional Law of the United States. New York: Baker,Voorhis, 1929.