MLA

C. Schumman from F. W. Egloffstein, Selmar Siebert's Engraving, et al. U.S.P.R.R. Exp. & Surveys. 41st Parallel. Expl. by Lieut. Beckwith. Vol.II. Northern Slopes of the Sierra Nevada June 30th at 9 A.M. View Towards the West 184 Taken from E See Map. 0AD. https://collections.library.yale.edu/catalog/2016524.

APA, 6th edition

C. Schumman from F. W. Egloffstein, S. S. E., Printing Establishment, W., & D. C. (0 C.E.). U.S.P.R.R. Exp. & Surveys. 41st Parallel. Expl. by Lieut. Beckwith. Vol.II. Northern Slopes of the Sierra Nevada June 30th at 9 A.M. View Towards the West 184 Taken from E See Map [Intaglio prints]. https://collections.library.yale.edu/catalog/2016524.