Yellowstone National Park. 8 mounted stereocards, 10 x 17.8 cm.
MLA
Hobart, Carroll T. Yellowstone National Park. 8 Mounted Stereocards, 10 x 17.8 Cm. 0AD. https://collections.library.yale.edu/catalog/2017204.
APA, 6th edition
Hobart, C. T. (0 C.E.). Yellowstone National Park. 8 mounted stereocards, 10 x 17.8 cm. https://collections.library.yale.edu/catalog/2017204.