Cite

"Inhalation of Ether in Surgery."

MLA

Hansen, Bert, 1944-. "Inhalation of Ether in Surgery.". Box 13, folder 27. 1847 March 6. https://collections.library.yale.edu/catalog/32327023.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 13, folder 27"])(1847 March 6)["Inhalation of Ether in Surgery."]. https://collections.library.yale.edu/catalog/32327023.