MLA

Trudeau, G. B., 1948-. Doonesbury. Box 1997. 1997 January 9. https://collections.library.yale.edu/catalog/2053535.

APA, 6th edition

Trudeau, G. B., 1948-. (["Box 1997"])(1997 January 9)[Doonesbury]. https://collections.library.yale.edu/catalog/2053535.