APA (7 वां संस्करण) प्रशस्ति पत्र

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

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

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

एमएलए (8वां संस्करण) प्रशस्ति पत्र

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