Cite

SF-239. Natural Park in Forest. Rockies.

MLA

McClintock, Walter, 1870-1949. SF-239. Natural Park in Forest. Rockies.. Box 146, folder 7679. undated. https://collections.library.yale.edu/catalog/10453824.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 146, folder 7679"])(undated)[SF-239. Natural Park in Forest. Rockies.]. https://collections.library.yale.edu/catalog/10453824.