MLA

Edwards, Jonathan, 1703-1758. "No. 321 A Sacramental discourse. Preach'd at Haverhill May 12, 1754" [author unknown]. Box 18, folder 480. 1754 May 12. https://collections.library.yale.edu/catalog/33304273.

APA, 6th edition

Edwards, Jonathan, 1703-1758. (["Box 18, folder 480"])(1754 May 12)["No. 321 A Sacramental discourse. Preach'd at Haverhill May 12, 1754" [author unknown]]. https://collections.library.yale.edu/catalog/33304273.