Cite

"An Error in Diagnosis."

MLA

Hansen, Bert, 1944-. "An Error in Diagnosis.". Box 13, folder 1. 1915 January 16. https://collections.library.yale.edu/catalog/32325665.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 13, folder 1"])(1915 January 16)["An Error in Diagnosis."]. https://collections.library.yale.edu/catalog/32325665.