U.S. Dept. of State. (1950). Point four: Cooperative program for aid in the development of economically underdeveloped areas. s.n.
Lua i Stíl Chicago (17ú heag.)U.S. Dept. of State. Point Four: Cooperative Program for Aid in the Development of Economically Underdeveloped Areas. Washington: s.n, 1950.
Lua MLA (9ú heag.)U.S. Dept. of State. Point Four: Cooperative Program for Aid in the Development of Economically Underdeveloped Areas. s.n, 1950.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.