MLA

of Public Affairs, Yale University. Office. Communiversity Day, 1 Page, Human Chess Game. 1981. https://collections.library.yale.edu/catalog/10013878.

APA, 6th edition

of Public Affairs, Y. U. O. (1981). Communiversity Day, 1 page, Human chess game. https://collections.library.yale.edu/catalog/10013878.