Não informado. (1935). Drama of the skies. American Museum of Natural History, Hayden Planetarium.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Drama of the Skies. New York: American Museum of Natural History, Hayden Planetarium, 1935.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Drama of the Skies. American Museum of Natural History, Hayden Planetarium, 1935.
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