MLA

McClintock, Walter, 1870-1949. 34, 213. [White Antelope, Siksikaikoan's (Little Blackfoot)/William Jackson's Wife, and Their Daughter Natoye.]. Box 61, folder 3042. 1938. https://collections.library.yale.edu/catalog/2008486.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 61, folder 3042"])(1938)[34, 213. [White Antelope, Siksikaikoan's (Little Blackfoot)/William Jackson's Wife, and Their Daughter Natoye.]]. https://collections.library.yale.edu/catalog/2008486.