Cite

Entrance to Cave of the Winds, Niagara Falls, N.Y

MLA

Entrance to Cave of the Winds, Niagara Falls, N.Y. 1892. https://collections.library.yale.edu/catalog/2014352.

APA, 6th edition

Entrance to Cave of the Winds, Niagara Falls, N.Y. (1892). [Card photographs, Photographic prints, Photographs, Snapshots]. https://collections.library.yale.edu/catalog/2014352.