MLA

Phi Beta Kappa. Connecticut Alpha (Yale University). Catalogue of members, Union College. Box 3, folder 173. 1817 and 1818. https://collections.library.yale.edu/catalog/32542945.

APA, 6th edition

Phi Beta Kappa. Connecticut Alpha (Yale University). (["Box 3, folder 173"])(1817 and 1818)[Catalogue of members, Union College]. https://collections.library.yale.edu/catalog/32542945.