Cite

Photographs taken during construction of the Union Pacific Railroad [graphic].

MLA

Russell, Andrew J. Photographs Taken during Construction of the Union Pacific Railroad [Graphic]. 0AD. https://collections.library.yale.edu/catalog/2014909.

APA, 6th edition

Russell, A. J. (0 C.E.). Photographs taken during construction of the Union Pacific Railroad [graphic]. [Pictorial works, Photographic prints]. https://collections.library.yale.edu/catalog/2014909.