Cite

U.S.P.R.R. Exp. & Surveys. Cal. Plate II. Entrance to Livermore's Pass

MLA

Charles Koppel, T. Sinclair's Lith., and Pennsylvania Philadelphia. U.S.P.R.R. Exp. & Surveys. Cal. Plate II. Entrance to Livermore's Pass. 0AD. https://collections.library.yale.edu/catalog/2015569.

APA, 6th edition

Charles Koppel, T. S. L., & Philadelphia, P. (0 C.E.). U.S.P.R.R. Exp. & Surveys. Cal. Plate II. Entrance to Livermore's Pass [Lithographs, Planographic prints]. https://collections.library.yale.edu/catalog/2015569.