MLA

P. H. Schmidt, Thoms, Herbert (1885-1972). Forceps. Box 049. https://collections.library.yale.edu/catalog/17322033.

APA, 6th edition

P. H. Schmidt, & Thoms, Herbert (1885-1972). (["Box 049"])[Forceps]. https://collections.library.yale.edu/catalog/17322033.