MLA

Trudeau, G. B., 1948-. Doonesbury. Box 1984-87. 1987 May 31. https://collections.library.yale.edu/catalog/2053573.

APA, 6th edition

Trudeau, G. B., 1948-. (["Box 1984-87"])(1987 May 31)[Doonesbury]. https://collections.library.yale.edu/catalog/2053573.