MLA

Trudeau, G. B., 1948-. Doonesbury. Box 2000. 2000 February 12. https://collections.library.yale.edu/catalog/2053562.

APA, 6th edition

Trudeau, G. B., 1948-. (["Box 2000"])(2000 February 12)[Doonesbury]. https://collections.library.yale.edu/catalog/2053562.