"Columbia R. Oregon - opposite Fort Vancouver." Pencil drawing with wash, 17.9 x 26.8 cm.
MLA
Stenzel, Franz. "Columbia R. Oregon - Opposite Fort Vancouver." Pencil Drawing with Wash, 17.9 x 26.8 Cm. 1854. https://collections.library.yale.edu/catalog/10691239.
APA, 6th edition
Stenzel, F. (1854). "Columbia R. Oregon - opposite Fort Vancouver." Pencil drawing with wash, 17.9 x 26.8 cm. https://collections.library.yale.edu/catalog/10691239.