MLA

Stenzel, Franz (1906-1998). "Waterfall opposite the 'Bridal Veil' Yo-semite Valley Cala." Watercolor, 30.9 x 23.6 cm.. Box 2, folder 21. 1859. https://collections.library.yale.edu/catalog/10691073.

APA, 6th edition

Stenzel, Franz (1906-1998). (["Box 2, folder 21"])(1859)["Waterfall opposite the 'Bridal Veil' Yo-semite Valley Cala." Watercolor, 30.9 x 23.6 cm.]. https://collections.library.yale.edu/catalog/10691073.