APA (7 वां संस्करण) प्रशस्ति पत्र
ebrary, Inc. (2004). Stepping-stones to the future of space exploration: A workshop report. National Academies Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
ebrary, Inc. Stepping-stones to the Future of Space Exploration: A Workshop Report. Washington, D.C.: National Academies Press, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
ebrary, Inc. Stepping-stones to the Future of Space Exploration: A Workshop Report. National Academies Press, 2004.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.