MLA

Phi Beta Kappa. Connecticut Alpha (Yale University). Account of commencement, Union College, Andrew Gates. Box 3, folder 174. 1822 October. https://collections.library.yale.edu/catalog/32542951.

APA, 6th edition

Phi Beta Kappa. Connecticut Alpha (Yale University). (["Box 3, folder 174"])(1822 October)[Account of commencement, Union College, Andrew Gates]. https://collections.library.yale.edu/catalog/32542951.