Cita APA

Willoughby, W. W. (1929). The constitutional law of the United States (2a. ed.). New York.

Citación estilo Chicago

Willoughby, Westel Woodbury. The Constitutional Law of the United States. 2a. ed. New York, 1929.

Cita MLA

Willoughby, Westel Woodbury. The Constitutional Law of the United States. 2a. ed. New York, 1929.