APA ציטוט

Williams, B., & Epstein, S. (1958). The rocket pioneers on the road to space. New York: Julian Messner.

Trích dẫn kiểu Chicago

Williams, Beryl., và Samuel Epstein. The Rocket Pioneers On the Road to Space. New York: Julian Messner, 1958.

ציטוט MLA

Williams, Beryl., và Samuel Epstein. The Rocket Pioneers On the Road to Space. New York: Julian Messner, 1958.