Cite

"Mr. Vanderbilt."

MLA

Hansen, Bert, 1944-. "Mr. Vanderbilt.". Box 5, folder 9. 1885 December 19. https://collections.library.yale.edu/catalog/32332478.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 5, folder 9"])(1885 December 19)["Mr. Vanderbilt."]. https://collections.library.yale.edu/catalog/32332478.