Cita APA (7a ed.)

Willoughby, W. W. (1929). The constitutional law of the United States (2nd ed.). Baker, Voorhis and Company.

Cita Chicago Style (17a ed.)

Willoughby, Westel Woodbury. The Constitutional Law of the United States. 2nd ed. New York: Baker, Voorhis and Company, 1929.

Cita MLA (9a ed.)

Willoughby, Westel Woodbury. The Constitutional Law of the United States. 2nd ed. Baker, Voorhis and Company, 1929.