MLA

McClintock, Walter, 1870-1949. F5x7-79. Hunting Camp. Forks of Cutbank. Morning Mist and Mountain Peak. Indian Scout with Glasses.. Box 148, folder 7908. undated. https://collections.library.yale.edu/catalog/10453569.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 148, folder 7908"])(undated)[F5x7-79. Hunting Camp. Forks of Cutbank. Morning Mist and Mountain Peak. Indian Scout with Glasses.]. https://collections.library.yale.edu/catalog/10453569.