"Youngs River Falls, Oregon." Watercolor, 35 x 25 cm.
MLA
Stenzel, Franz. "Youngs River Falls, Oregon." Watercolor, 35 x 25 Cm. 1857. https://collections.library.yale.edu/catalog/10859867.
APA, 6th edition
Stenzel, F. (1857). "Youngs River Falls, Oregon." Watercolor, 35 x 25 cm. https://collections.library.yale.edu/catalog/10859867.