Cite

"Drawing the Serum From the Horse."

MLA

Hansen, Bert, 1944-. "Drawing the Serum From the Horse.". Box 12, folder 20. 1894 November 17. https://collections.library.yale.edu/catalog/32332491.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 12, folder 20"])(1894 November 17)["Drawing the Serum From the Horse."]. https://collections.library.yale.edu/catalog/32332491.