MLA

McClintock, Walter, 1870-1949. 262c. [Conifer Forest. Mountains in Distance. Clouds.]. Box 72, folder 4066. 1905 1941. https://collections.library.yale.edu/catalog/2010614.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 72, folder 4066"])(1905 1941)[262c. [Conifer Forest. Mountains in Distance. Clouds.]]. https://collections.library.yale.edu/catalog/2010614.