Cite

[Watercolor and charcoal drawing of Richard Nixon]

MLA

Osborn, Robert Chesley, 1904-. [Watercolor and charcoal drawing of Richard Nixon]. Undated. https://collections.library.yale.edu/catalog/2004411.

APA, 6th edition

Osborn, Robert Chesley, 1904-. (Undated)[[Watercolor and charcoal drawing of Richard Nixon]]. https://collections.library.yale.edu/catalog/2004411.