Cite
Letter Governor James B. A. Robertson to Cyrus S. Avery, Tulsa, 1921 July 18
MLA
Robertson, James B. A., 1871-1938. "Letter Governor James B. A. Robertson to Cyrus S. Avery, Tulsa, 1921 July 18." Oklahoma. Department of Libraries. 1921-07-18, http://digitalprairie.ok.gov/cdm/ref/collection/race-riot/id/193.
APA
Robertson, James B. A., 1871-1938 (1921-07-18). Letter Governor James B. A. Robertson to Cyrus S. Avery, Tulsa, 1921 July 18. Retrieved from http://digitalprairie.ok.gov/cdm/ref/collection/race-riot/id/193
Chicago
Robertson, James B. A., 1871-1938. "Letter Governor James B. A. Robertson to Cyrus S. Avery, Tulsa, 1921 July 18." 1921-07-18. August 3, 2025. http://digitalprairie.ok.gov/cdm/ref/collection/race-riot/id/193.