U.S.P.R.R. Exp. & Surveys-Cal. & Oregon. Botany-Plate V. Pinus contorta
MLA
U.S.P.R.R. Exp. & Surveys-Cal. & Oregon. Botany-Plate V. Pinus Contorta. 0AD. https://collections.library.yale.edu/catalog/2015732.
APA, 6th edition
U.S.P.R.R. Exp. & Surveys-Cal. & Oregon. Botany-Plate V. Pinus contorta. (0 C.E.). [Lithographs, Planographic prints]. https://collections.library.yale.edu/catalog/2015732.