MLA

Edwards, Jonathan, 1703-1758. 1. 1753 Apr 13. JE. Fragment of a letter draft to Mr. Oliver. On "Proclamation for a publick fast," for 19 April 1753.. Box 6, folder 243. 1753 April 13. https://collections.library.yale.edu/catalog/33307259.

APA, 6th edition

Edwards, Jonathan, 1703-1758. (["Box 6, folder 243"])(1753 April 13)[1. 1753 Apr 13. JE. Fragment of a letter draft to Mr. Oliver. On "Proclamation for a publick fast," for 19 April 1753.]. https://collections.library.yale.edu/catalog/33307259.