Blythe, I. B.
MLA
MacDonald, George, 1824-1905. Blythe, I. B.. Box 1, folder 47. 1875, n.d.. https://collections.library.yale.edu/catalog/17297717.
APA, 6th edition
MacDonald, George, 1824-1905. (["Box 1, folder 47"])(1875, n.d.)[Blythe, I. B.]. https://collections.library.yale.edu/catalog/17297717.