Cite

Osborn, Robert Chelsey, drawing by

MLA

Benét, William Rose, 1886-1950. Osborn, Robert Chelsey, drawing by. Box 90, folder 3008a. undated. https://collections.library.yale.edu/catalog/2003210.

APA, 6th edition

Benét, William Rose, 1886-1950. (["Box 90, folder 3008a"])(undated)[Osborn, Robert Chelsey, drawing by]. https://collections.library.yale.edu/catalog/2003210.