MLA

Yale Medical Library Associates (New Haven, Connecticut). Historical Library, Yale Medical Library. New Haven, Connecticut. box 1, folder 19. circa 1960-1969. https://collections.library.yale.edu/catalog/15789471.

APA, 6th edition

Yale Medical Library Associates (New Haven, Connecticut). (["box 1, folder 19"])(circa 1960-1969)[Historical Library, Yale Medical Library. New Haven, Connecticut]. https://collections.library.yale.edu/catalog/15789471.