MLA

Currier, and Ives. The Rocky Mountains : Emigrants Crossing the Plains. Published by Currier & Ives, 0AD. https://collections.library.yale.edu/catalog/2016111.

APA, 6th edition

C., & I. (0 C.E.). The Rocky Mountains : emigrants crossing the plains [Pictorial works, Lithographs]. Published by Currier & Ives. https://collections.library.yale.edu/catalog/2016111.