MLA

Trudeau, G. B., 1948-. Doonesbury. Box 1995. 1995 April 12. https://collections.library.yale.edu/catalog/2053234.

APA, 6th edition

Trudeau, G. B., 1948-. (["Box 1995"])(1995 April 12)[Doonesbury]. https://collections.library.yale.edu/catalog/2053234.