APA استشهاد

Rex Keller, H. (1971). The Dictionary of Dates. Hafner Pub Company.

استشهاد بنمط شيكاغو

Rex Keller, Helen. The Dictionary of Dates. New York: Hafner Pub Company, 1971.

MLA استشهاد

Rex Keller, Helen. The Dictionary of Dates. Hafner Pub Company, 1971.