U.S. Dept. of State. (1950). Point four: Cooperative program for aid in the development of economically underdeveloped areas. s.n.
Παραπομπή σε μορφή Chicago (17η εκδ.)U.S. Dept. of State. Point Four: Cooperative Program for Aid in the Development of Economically Underdeveloped Areas. Washington: s.n, 1950.
Παραπομπή σε μορφή MLA (9th εκδ.)U.S. Dept. of State. Point Four: Cooperative Program for Aid in the Development of Economically Underdeveloped Areas. s.n, 1950.
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