1. [Map of the United States of America that Shows the Four Reservations or Restricted Country of the Blackfeet.]
MLA
McClintock, Walter, 1870-1949. 1. [Map of the United States of America that Shows the Four Reservations or Restricted Country of the Blackfeet.]. Box 64, folder 3320. 1939. https://collections.library.yale.edu/catalog/2008881.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 64, folder 3320"])(1939)[1. [Map of the United States of America that Shows the Four Reservations or Restricted Country of the Blackfeet.]]. https://collections.library.yale.edu/catalog/2008881.
