Trích dẫn APA

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

Trích dẫn kiểu Chicago

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

Trích dẫn MLA

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

Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.