MLA

Edwards, Jonathan, 1703-1758. Wheelock, Eleazar. Box 22, folder 1320. 1748 Sep 14. https://collections.library.yale.edu/catalog/10900946.

APA, 6th edition

Edwards, Jonathan, 1703-1758. (["Box 22, folder 1320"])(1748 Sep 14)[Wheelock, Eleazar]. https://collections.library.yale.edu/catalog/10900946.