F940e. Big Moon and Walter McClintock. Telescope.
MLA
McClintock, Walter, 1870-1949. F940e. Big Moon and Walter McClintock. Telescope.. Box 141, folder 7102. 1909. https://collections.library.yale.edu/catalog/10452795.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 141, folder 7102"])(1909)[F940e. Big Moon and Walter McClintock. Telescope.]. https://collections.library.yale.edu/catalog/10452795.