Cite

SF-37. Trail. Bear Grass.

MLA

McClintock, Walter, 1870-1949. SF-37. Trail. Bear Grass.. Box 145, folder 7479. undated. https://collections.library.yale.edu/catalog/10453622.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 145, folder 7479"])(undated)[SF-37. Trail. Bear Grass.]. https://collections.library.yale.edu/catalog/10453622.