Cite

SF-25. Canadian Rockies.

MLA

McClintock, Walter, 1870-1949. SF-25. Canadian Rockies.. Box 145, folder 7467. undated. https://collections.library.yale.edu/catalog/10453610.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 145, folder 7467"])(undated)[SF-25. Canadian Rockies.]. https://collections.library.yale.edu/catalog/10453610.