MLA

Belt, Elmer, 1893-1980, The Elmer Belt Library of Vinciana, Yale University. School of Medicine. Elmer Belt Library of Vinciana. 20th century. https://collections.library.yale.edu/catalog/16788802.

APA, 6th edition

Belt, Elmer, 1893-1980, & The Elmer Belt Library of Vinciana, & Yale University. School of Medicine. (20th century)[Elmer Belt Library of Vinciana]. https://collections.library.yale.edu/catalog/16788802.