"Pasteur in his laboratory."
MLA
Hansen, Bert, 1944-. "Pasteur in his laboratory.". Box 13, folder 21. 1890 October 7. https://collections.library.yale.edu/catalog/32332231.
APA, 6th edition
Hansen, Bert, 1944-. (["Box 13, folder 21"])(1890 October 7)["Pasteur in his laboratory."]. https://collections.library.yale.edu/catalog/32332231.