MLA

Oastler, Frank Richard, 1871-1936. Isle Royale and Yellowstone. Box 62, folder 62. [1934]. https://collections.library.yale.edu/catalog/15831815.

APA, 6th edition

Oastler, Frank Richard, 1871-1936. (["Box 62, folder 62"])([1934])[Isle Royale and Yellowstone]. https://collections.library.yale.edu/catalog/15831815.