APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.