National Optical Astronomy Observatory (U.S.), Astronomical Society of the Pacific, & American Astronomical Society. (2001). Astronomy education review. National Optical Astronomy Observatory.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Optical Astronomy Observatory (U.S.), Astronomical Society of the Pacific, और American Astronomical Society. Astronomy Education Review. Tucson, AZ: National Optical Astronomy Observatory, 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNational Optical Astronomy Observatory (U.S.), et al. Astronomy Education Review. National Optical Astronomy Observatory, 2001.
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