F978b. Pack Train on Shore of Lake. Walter McClintock and Norman McClintock.
MLA
McClintock, Walter, 1870-1949. F978b. Pack Train on Shore of Lake. Walter McClintock and Norman McClintock.. Box 142, folder 7227. 1909. https://collections.library.yale.edu/catalog/10452920.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 142, folder 7227"])(1909)[F978b. Pack Train on Shore of Lake. Walter McClintock and Norman McClintock.]. https://collections.library.yale.edu/catalog/10452920.