MLA

Hill, George Roy, 1921-2002. Storyboard art. folder 109. circa 1968. https://collections.library.yale.edu/catalog/10020537.

APA, 6th edition

Hill, George Roy, 1921-2002. (["folder 109"])(circa 1968)[Storyboard art]. https://collections.library.yale.edu/catalog/10020537.