Cite

Printed advertisement (2 copies) (In Series VI)

MLA

Whitman, Walt, 1819-1892. Printed advertisement (2 copies) (In Series VI). Box 15, folder 265. n.d.. https://collections.library.yale.edu/catalog/2053888.

APA, 6th edition

Whitman, Walt, 1819-1892. (["Box 15, folder 265"])(n.d.)[Printed advertisement (2 copies) (In Series VI)]. https://collections.library.yale.edu/catalog/2053888.