Não informado. (1987). Astrophysical Letters & Communications. Gordon and Breach Science Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Astrophysical Letters & Communications. New York: Gordon and Breach Science Publishers, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Astrophysical Letters & Communications. Gordon and Breach Science Publishers, 1987.
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