Cite

"The Modern Ark."

MLA

Hansen, Bert, 1944-. "The Modern Ark.". Box 3, folder 18. 1871 May 6. https://collections.library.yale.edu/catalog/32332539.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 3, folder 18"])(1871 May 6)["The Modern Ark."]. https://collections.library.yale.edu/catalog/32332539.