Dyfyniad APA

Willoughby, W. W. (1910). The rights and duties of American citizenship. American Book Co..

Dyfyniad Arddull Chicago

Willoughby, Westel Woodbury. The Rights and Duties of American Citizenship. New York : Cincinnati [etc.]: American Book Co., 1910.

Dyfyniad MLA

Willoughby, Westel Woodbury. The Rights and Duties of American Citizenship. American Book Co., 1910.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.