Illingworth, V. (1979). The Facts on the file dictionary of astronomy. Facts on File.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रIllingworth, Valerie. The Facts on the File Dictionary of Astronomy. New York: Facts on File, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रIllingworth, Valerie. The Facts on the File Dictionary of Astronomy. Facts on File, 1979.
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