Não informado. (1924). Contributions from the Museum of Geology of the University of Michigan. University of Michigan, Museum of Geology.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Contributions from the Museum of Geology of the University of Michigan. Ann Arbor, Mich: University of Michigan, Museum of Geology, 1924.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Contributions from the Museum of Geology of the University of Michigan. University of Michigan, Museum of Geology, 1924.
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