Sherwood, G. H. (1920). Free nature education by the American Museum of Natural History in public schools and colleges: History and status of museum instruction and its extension to the schools of greater New York and vicinity. The Museum.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSherwood, George Herbert. Free Nature Education by the American Museum of Natural History in Public Schools and Colleges: History and Status of Museum Instruction and Its Extension to the Schools of Greater New York and Vicinity. New York: The Museum, 1920.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSherwood, George Herbert. Free Nature Education by the American Museum of Natural History in Public Schools and Colleges: History and Status of Museum Instruction and Its Extension to the Schools of Greater New York and Vicinity. The Museum, 1920.