APA (7e ed.) Bronvermelding

Southworth, G. V. D., & Southworth, J. V. D. (1951). A work book on The story of our America. Iroquois Pub. Co..

Chicago (17e ed.) Bronvermelding

Southworth, Gertrude Van Duyn, en John Van Duyn Southworth. A Work Book on The Story of Our America. Iroquois Pub. Co., 1951.

MLA (8e ed.) Bronvermelding

Southworth, Gertrude Van Duyn, en John Van Duyn Southworth. A Work Book on The Story of Our America. Iroquois Pub. Co., 1951.