Cite

Certificate of copyright for Leaves of Grass

MLA

Whitman, Walt, 1819-1892. Certificate of copyright for Leaves of Grass. Box 4, folder 197. 1872 Jul 13. https://collections.library.yale.edu/catalog/2053826.

APA, 6th edition

Whitman, Walt, 1819-1892. (["Box 4, folder 197"])(1872 Jul 13)[Certificate of copyright for Leaves of Grass]. https://collections.library.yale.edu/catalog/2053826.