MLA

Linton, W. J. (William James), 1812-1897. Whitman, Walt. Box 2, folder 118. 1872–1888. https://collections.library.yale.edu/catalog/16191002.

APA, 6th edition

Linton, W. J. (William James), 1812-1897. (["Box 2, folder 118"])(1872–1888)[Whitman, Walt]. https://collections.library.yale.edu/catalog/16191002.