APA-viite

Willoughby, W. W. (1929). The constitutional law of the United States - volume 1 (2nd ed.). Baker Voorghis and company.

Chicago-tyylinen lähdeviittaus

Willoughby, Westel Woodbury. The Constitutional Law of the United States - Volume 1. 2nd ed. NewYork: Baker Voorghis and company, 1929.

MLA-viite

Willoughby, Westel Woodbury. The Constitutional Law of the United States - Volume 1. 2nd ed. Baker Voorghis and company, 1929.