Chicago Natural History Museum. (1944). Report of the Director to the Board of Trustees for the year ... The Museum.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रChicago Natural History Museum. Report of the Director to the Board of Trustees for the Year ... [Chicago]: The Museum, 1944.
एमएलए (8वां संस्करण) प्रशस्ति पत्रChicago Natural History Museum. Report of the Director to the Board of Trustees for the Year ... The Museum, 1944.
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