"Columbia R. on the Cascade Portage." Watercolor, 23.5 x 30.5 cm.
MLA
Stenzel, Franz. "Columbia R. on the Cascade Portage." Watercolor, 23.5 x 30.5 Cm. 1857. https://collections.library.yale.edu/catalog/10701745.
APA, 6th edition
Stenzel, F. (1857). "Columbia R. on the Cascade Portage." Watercolor, 23.5 x 30.5 cm. https://collections.library.yale.edu/catalog/10701745.