U.S. Geographical surveys west of the 100th meridian. Vol. I Geographical report. Plate No. XII. Alpine Lake, summit of Cerro Blanco near Fort Carland, Colo. 1874
MLA
U.S. Geographical Surveys West of the 100th Meridian. Vol. I Geographical Report. Plate No. XII. Alpine Lake, Summit of Cerro Blanco near Fort Carland, Colo. 1874. 1873. https://collections.library.yale.edu/catalog/2015850.
APA, 6th edition
U.S. Geographical surveys west of the 100th meridian. Vol. I Geographical report. Plate No. XII. Alpine Lake, summit of Cerro Blanco near Fort Carland, Colo. 1874. (1873). [Lithographs, Planographic prints]. https://collections.library.yale.edu/catalog/2015850.