Cite

New York from a balloon : pictorial map of New York and vicinity, showing the suburban towns, railroad and water communications.

MLA

New York from a Balloon : Pictorial Map of New York and Vicinity, Showing the Suburban Towns, Railroad and Water Communications. Harper's Weekly Supplement, 1871. https://collections.library.yale.edu/catalog/15827453.

APA, 6th edition

New York from a balloon : pictorial map of New York and vicinity, showing the suburban towns, railroad and water communications. (1871). [Maps]. Harper's Weekly Supplement, https://collections.library.yale.edu/catalog/15827453.