MLA

Edwards, Jonathan, 1703-1758. ALS. Box 22, folder 1288. 1749 May 24. https://collections.library.yale.edu/catalog/10900916.

APA, 6th edition

Edwards, Jonathan, 1703-1758. (["Box 22, folder 1288"])(1749 May 24)[ALS]. https://collections.library.yale.edu/catalog/10900916.