MLA

Trudeau, G. B., 1948-. Daily pencils. Box 159. [1998?]. https://collections.library.yale.edu/catalog/2053538.

APA, 6th edition

Trudeau, G. B., 1948-. (["Box 159"])([1998?])[Daily pencils]. https://collections.library.yale.edu/catalog/2053538.