MLA

Hansen, Bert, 1944-. "--!-- ". Box 9, folder 17. 1884 November 19. https://collections.library.yale.edu/catalog/32331517.

APA, 6th edition

Hansen, Bert, 1944-. (["Box 9, folder 17"])(1884 November 19)["--!-- "]. https://collections.library.yale.edu/catalog/32331517.