MLA

Trudeau, G. B., 1948-. Doonesbury. Box 1976-79. 1977 March 27. https://collections.library.yale.edu/catalog/2053569.

APA, 6th edition

Trudeau, G. B., 1948-. (["Box 1976-79"])(1977 March 27)[Doonesbury]. https://collections.library.yale.edu/catalog/2053569.