942. [Brave Dogs Marching.]
MLA
McClintock, Walter, 1870-1949. 942. [Brave Dogs Marching.]. Box 68, folder 3751. undated. https://collections.library.yale.edu/catalog/2009942.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 68, folder 3751"])(undated)[942. [Brave Dogs Marching.]]. https://collections.library.yale.edu/catalog/2009942.