Cite

Photographs of a railroad trip from Niagara Falls to Colorado

MLA

Photographs of a Railroad Trip from Niagara Falls to Colorado. 1892. https://collections.library.yale.edu/catalog/2014351.

APA, 6th edition

Photographs of a railroad trip from Niagara Falls to Colorado. (1892). [Pictorial works, Photographic prints, Card photographs (photographs)]. https://collections.library.yale.edu/catalog/2014351.