Cite

Preface, autograph manuscript

MLA

De Morgan, William, 1839-1917. Preface, autograph manuscript. Box 6, folder 40. circa 1904. https://collections.library.yale.edu/catalog/17467672.

APA, 6th edition

De Morgan, William, 1839-1917. (["Box 6, folder 40"])(circa 1904)[Preface, autograph manuscript]. https://collections.library.yale.edu/catalog/17467672.