SF-132. Mountain Flowers.
MLA
McClintock, Walter, 1870-1949. SF-132. Mountain Flowers.. Box 145, folder 7572. undated. https://collections.library.yale.edu/catalog/10453717.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 145, folder 7572"])(undated)[SF-132. Mountain Flowers.]. https://collections.library.yale.edu/catalog/10453717.