Cite

Ellet, E. F. (Elizabeth Fries)

MLA

Cooper, James Fenimore, 1789-1851. Ellet, E. F. (Elizabeth Fries). Box 4, folder 93. undated. https://collections.library.yale.edu/catalog/2011377.

APA, 6th edition

Cooper, James Fenimore, 1789-1851. (["Box 4, folder 93"])(undated)[Ellet, E. F. (Elizabeth Fries)]. https://collections.library.yale.edu/catalog/2011377.