MLA

Edwards, Jonathan, 1703-1758. IS. 40:29-31: "Obs. 6...To wait on God in the improvement of what strength we have is the way to receive more and more strength" (p. 1). Box 4, folder 301. 1741 Mar. https://collections.library.yale.edu/catalog/10691953.

APA, 6th edition

Edwards, Jonathan, 1703-1758. (["Box 4, folder 301"])(1741 Mar)[IS. 40:29-31: "Obs. 6...To wait on God in the improvement of what strength we have is the way to receive more and more strength" (p. 1)]. https://collections.library.yale.edu/catalog/10691953.