MLA

Trudeau, G. B., 1948-. Doonesbury. Box 2001. 2001 December 21. https://collections.library.yale.edu/catalog/2053566.

APA, 6th edition

Trudeau, G. B., 1948-. (["Box 2001"])(2001 December 21)[Doonesbury]. https://collections.library.yale.edu/catalog/2053566.