Cite

Photographs of Oregon Pacific Railroad construction

MLA

Crawford, and Paxton Photos. Photographs of Oregon Pacific Railroad Construction. Crawford & Paxton Photos, 0AD. https://collections.library.yale.edu/catalog/2001122.

APA, 6th edition

C., & Photos, P. (0 C.E.). Photographs of Oregon Pacific Railroad construction [Pictorial works, Photographic prints, Card photographs (photographs)]. Crawford & Paxton Photos. https://collections.library.yale.edu/catalog/2001122.