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..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ponca Tribe of Indians of Oklahoma و 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ponca Tribe of Indians of Oklahoma و 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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.