Cite

"The Great Congressional Oleomargarine Investigation."

MLA

Hansen, Bert, 1944-. "The Great Congressional Oleomargarine Investigation.". Box 8, folder 12. 1880 April 21. https://collections.library.yale.edu/catalog/32331487.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 8, folder 12"])(1880 April 21)["The Great Congressional Oleomargarine Investigation."]. https://collections.library.yale.edu/catalog/32331487.