Simpson's perforator
MLA
Charles Lentz and Sons, Thoms, Herbert (1885-1972). Simpson's perforator. Box 049. https://collections.library.yale.edu/catalog/17322005.
APA, 6th edition
Charles Lentz and Sons, & Thoms, Herbert (1885-1972). (["Box 049"])[Simpson's perforator]. https://collections.library.yale.edu/catalog/17322005.