Não informado. (1969). Journal of Development Planning. United Nations, Department of Economic and Social Affairs.
Citação do estilo Chicago (17ª ed.)Não informado. Journal of Development Planning. New York: United Nations, Department of Economic and Social Affairs, 1969.
Citação MLA (8ª ed.)Não informado. Journal of Development Planning. United Nations, Department of Economic and Social Affairs, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.