Cite

"The Smallpox Excitement."

MLA

Hansen, Bert, 1944-. "The Smallpox Excitement.". Box 2, folder 9. 1872 April 6. https://collections.library.yale.edu/catalog/32328831.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 2, folder 9"])(1872 April 6)["The Smallpox Excitement."]. https://collections.library.yale.edu/catalog/32328831.