APA-referens (7:e uppl.)

Ponca Tribe of Indians of Oklahoma & United States. Bureau of Indian Affairs. (1951). Constitution and bylaws of the Ponca Tribe of Indians, Oklahoma: Ratified September 20, 1950. U.S. G.P.O..

Chicago-referens (17:e uppl.)

Ponca Tribe of Indians of Oklahoma och United States. Bureau of Indian Affairs. Constitution and Bylaws of the Ponca Tribe of Indians, Oklahoma: Ratified September 20, 1950. Washington: U.S. G.P.O., 1951.

MLA-referens (8:e uppl.)

Ponca Tribe of Indians of Oklahoma och United States. Bureau of Indian Affairs. Constitution and Bylaws of the Ponca Tribe of Indians, Oklahoma: Ratified September 20, 1950. U.S. G.P.O., 1951.