Cite

T. Johnson etching

MLA

Whitman, Walt, 1819-1892. T. Johnson etching. Box 11, folder 234. n.d.. https://collections.library.yale.edu/catalog/2053859.

APA, 6th edition

Whitman, Walt, 1819-1892. (["Box 11, folder 234"])(n.d.)[T. Johnson etching]. https://collections.library.yale.edu/catalog/2053859.