APA استشهاد

Nicolson, I., & Davies, G. C. (1971). Astronomy. Grosset & Dunlap.

استشهاد بنمط شيكاغو

Nicolson, Iain, و Gordon C. Davies. Astronomy. New York: Grosset & Dunlap, 1971.

MLA استشهاد

Nicolson, Iain, و Gordon C. Davies. Astronomy. Grosset & Dunlap, 1971.