MLA

Oastler, Frank Richard, 1871-1936. Mount Rainier National Park, Rocky Mountain National Park, Grand Teton National Park, Zion National Park, Mesa Verde National Park. Box 53, folder 53. [1929]. https://collections.library.yale.edu/catalog/15831910.

APA, 6th edition

Oastler, Frank Richard, 1871-1936. (["Box 53, folder 53"])([1929])[Mount Rainier National Park, Rocky Mountain National Park, Grand Teton National Park, Zion National Park, Mesa Verde National Park]. https://collections.library.yale.edu/catalog/15831910.