U.S.P.R.R. Exp. & Surveys. 41st parallel. Expl. by Lieut. Beckwith. Vol.II. West end of Madelin Pass June 26th at 8 A.M. from a peak overlooking Madelin Creek
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. West End of Madelin Pass June 26th at 8 A.M. from a Peak Overlooking Madelin Creek. 0AD. https://collections.library.yale.edu/catalog/2015821.
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. West end of Madelin Pass June 26th at 8 A.M. from a peak overlooking Madelin Creek [Intaglio prints]. https://collections.library.yale.edu/catalog/2015821.