U.S.P.R.R. Exp. & Surveys. 41st parallel. Expl by Lieut. Beckwith. Vol. II. Franklin Valley. May 24th at 10 P.M. from a spur of the Humboldt Mountains
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. Franklin Valley. May 24th at 10 P.M. from a Spur of the Humboldt Mountains. 0AD. https://collections.library.yale.edu/catalog/2015818.
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. Franklin Valley. May 24th at 10 P.M. from a spur of the Humboldt Mountains [Intaglio prints]. https://collections.library.yale.edu/catalog/2015818.