MLA

[John Young]. U.S.P.R.R. Exp. & Surveys-Cal. & Oregon. General Report-Plate V. Cascade Range with Mount Jefferson, Mount Hood and Mount Adams, from pass west of Camp 40. Report of Lieut. Henry L. Abbotupon explorations for a railroad route, from the Sacramento Valley to the Columbia River, made by Lieut R. S. Williamson1855. Volume VI from Reports of explorations and surveys, to ascertain the most practicable and economi. ca. 1855. https://collections.library.yale.edu/catalog/2015689.

APA, 6th edition

[John Young]. (["Report of Lieut. Henry L. Abbotupon explorations for a railroad route, from the Sacramento Valley to the Columbia River, made by Lieut R. S. Williamson1855. Volume VI from Reports of explorations and surveys, to ascertain the most practicable and economi"])(ca. 1855)[U.S.P.R.R. Exp. & Surveys-Cal. & Oregon. General Report-Plate V. Cascade Range with Mount Jefferson, Mount Hood and Mount Adams, from pass west of Camp 40]. https://collections.library.yale.edu/catalog/2015689.