Cite

"Modern Improvements."

MLA

Hansen, Bert, 1944-. "Modern Improvements.". Box 12, folder 6. 1911 March 22. https://collections.library.yale.edu/catalog/32331918.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 12, folder 6"])(1911 March 22)["Modern Improvements."]. https://collections.library.yale.edu/catalog/32331918.