MLA

Audubon, John James, 1785-1851. Untitled, showing 155th - 158th Street, in ink, signed "F. T. Vidal, City Surveyor". Box 16, folder 727. n.d.. https://collections.library.yale.edu/catalog/2077408.

APA, 6th edition

Audubon, John James, 1785-1851. (["Box 16, folder 727"])(n.d.)[Untitled, showing 155th - 158th Street, in ink, signed "F. T. Vidal, City Surveyor"]. https://collections.library.yale.edu/catalog/2077408.