MLA

Edwards, Jonathan, 1703-1758. Williams, William to Benjamin Colman. Box 22, folder 1338. 1738 Oct 11. https://collections.library.yale.edu/catalog/10900964.

APA, 6th edition

Edwards, Jonathan, 1703-1758. (["Box 22, folder 1338"])(1738 Oct 11)[Williams, William to Benjamin Colman]. https://collections.library.yale.edu/catalog/10900964.