MLA

Office, United States. General Land. Sectionized Map of Cheyenne River and Standing Rock Indian Reservation Opened by Act of May 29, 1908 [Cartographic Material]. Dept. of the Interior, General Land Office, Andrew B. Graham Co.), 0AD. https://collections.library.yale.edu/catalog/32493516.

APA, 6th edition

Office, U. S. G. L. (0 C.E.). Sectionized map of Cheyenne River and Standing Rock Indian Reservation opened by act of May 29, 1908 [cartographic material] [Maps]. Dept. of the Interior, General Land Office, Andrew B. Graham Co.). https://collections.library.yale.edu/catalog/32493516.