MLA

McAdoo, Orpheus M. (Orpheus Myron), 1858-1900. Orpheus McAdoo's will, exemplification of probate. Box 3, folder 33. 1900. https://collections.library.yale.edu/catalog/16026936.

APA, 6th edition

McAdoo, Orpheus M. (Orpheus Myron), 1858-1900. (["Box 3, folder 33"])(1900)[Orpheus McAdoo's will, exemplification of probate]. https://collections.library.yale.edu/catalog/16026936.