Cita APA (7a ed.)

Southworth, G. V. D., & Southworth, J. V. D. (1958). A work book on Long ago in the Old World. Iroquois Pub. Co..

Cita Chicago Style (17a ed.)

Southworth, Gertrude Van Duyn, y John Van Duyn Southworth. A Work Book on Long Ago in the Old World. Syracuse, N.Y.: Iroquois Pub. Co., 1958.

Cita MLA (8a ed.)

Southworth, Gertrude Van Duyn, y John Van Duyn Southworth. A Work Book on Long Ago in the Old World. Iroquois Pub. Co., 1958.