MLA

Edwards, Jonathan, 1703-1758. Edwards, Timothy. Box 26, folder 1424. 1777 Dec 18. https://collections.library.yale.edu/catalog/10956675.

APA, 6th edition

Edwards, Jonathan, 1703-1758. (["Box 26, folder 1424"])(1777 Dec 18)[Edwards, Timothy]. https://collections.library.yale.edu/catalog/10956675.