Rigge, W. F. (1924). The graphic construction of eclipses and occultations. Loyola University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRigge, William F. The Graphic Construction of Eclipses and Occultations. Chicago, Ill.: Loyola University Press, 1924.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRigge, William F. The Graphic Construction of Eclipses and Occultations. Loyola University Press, 1924.
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