915. [North Piegan camp near the Porcupine Mountains in Alberta.]
MLA
McClintock, Walter, 1870-1949. 915. [North Piegan camp near the Porcupine Mountains in Alberta.]. Box 68, folder 3724. undated. https://collections.library.yale.edu/catalog/2009901.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 68, folder 3724"])(undated)[915. [North Piegan camp near the Porcupine Mountains in Alberta.]]. https://collections.library.yale.edu/catalog/2009901.