APA (7th ed.) Citation

Willoughby, W. W. (1919). Principles of the constitutional law of the United States. Baker Voorhis and Co..

Chicago Style (17th ed.) Citation

Willoughby, Westel W. Principles of the Constitutional Law of the United States. New York: Baker Voorhis and Co., 1919.

MLA (9th ed.) Citation

Willoughby, Westel W. Principles of the Constitutional Law of the United States. Baker Voorhis and Co., 1919.

Warning: These citations may not always be 100% accurate.