Cite
Letter Governor James B. A. Robertson to Cyrus S. Avery, Tulsa, 1921 July 11
MLA
Robertson, James B. A., 1871-1938. "Letter Governor James B. A. Robertson to Cyrus S. Avery, Tulsa, 1921 July 11." Oklahoma. Department of Libraries. 1921-07-11, http://digitalprairie.ok.gov/cdm/ref/collection/race-riot/id/190.
APA
Robertson, James B. A., 1871-1938 (1921-07-11). Letter Governor James B. A. Robertson to Cyrus S. Avery, Tulsa, 1921 July 11. Retrieved from http://digitalprairie.ok.gov/cdm/ref/collection/race-riot/id/190
Chicago
Robertson, James B. A., 1871-1938. "Letter Governor James B. A. Robertson to Cyrus S. Avery, Tulsa, 1921 July 11." 1921-07-11. August 3, 2025. http://digitalprairie.ok.gov/cdm/ref/collection/race-riot/id/190.