Fraknoi, A., & Morrison, D. W. (2000). Voyages to the stars and galaxies (2nd.). Saunders College Publishing.
शिकागो स्टाइल उद्धरणFraknoi, Andrew, और David Wolff Morrison. Voyages to the Stars and Galaxies. 2nd. New York: Saunders College Publishing, 2000.
एमएलए उद्धरणFraknoi, Andrew, और David Wolff Morrison. Voyages to the Stars and Galaxies. 2nd. Saunders College Publishing, 2000.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.