MLA

Edwards, Jonathan, 1703-1758. 2. 1752 Nov 23. JE. Transcript of a letter to John Erskine, in an unidentified hand.. Box 6, folder 205. 1752 November 23. https://collections.library.yale.edu/catalog/33306943.

APA, 6th edition

Edwards, Jonathan, 1703-1758. (["Box 6, folder 205"])(1752 November 23)[2. 1752 Nov 23. JE. Transcript of a letter to John Erskine, in an unidentified hand.]. https://collections.library.yale.edu/catalog/33306943.