MLA

Edwards, Jonathan, 1703-1758. Williams, Solomon. Box 22, folder 1334. 1750 Aug 20. https://collections.library.yale.edu/catalog/10900960.

APA, 6th edition

Edwards, Jonathan, 1703-1758. (["Box 22, folder 1334"])(1750 Aug 20)[Williams, Solomon]. https://collections.library.yale.edu/catalog/10900960.