MLA

H. D. Schmidt, Steiner, L. H. (Lewis Henry) (1827-1892). Surgical wallet. Box 009. 1850 - 1860. https://collections.library.yale.edu/catalog/17318820.

APA, 6th edition

H. D. Schmidt, & Steiner, L. H. (Lewis Henry) (1827-1892). (["Box 009"])(1850 - 1860)[Surgical wallet]. https://collections.library.yale.edu/catalog/17318820.