MLA

Trudeau, G. B., 1948-. Doonesbury. Box 1992. 1992 September 19. https://collections.library.yale.edu/catalog/2053181.

APA, 6th edition

Trudeau, G. B., 1948-. (["Box 1992"])(1992 September 19)[Doonesbury]. https://collections.library.yale.edu/catalog/2053181.