Cite

Letter to "Dear Madam"

MLA

De Morgan, William, 1839-1917. Letter to "Dear Madam". Box 1, folder 7. 1898 Feb 13. https://collections.library.yale.edu/catalog/17467671.

APA, 6th edition

De Morgan, William, 1839-1917. (["Box 1, folder 7"])(1898 Feb 13)[Letter to "Dear Madam"]. https://collections.library.yale.edu/catalog/17467671.