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Dyfyniad Arddull ChicagoBranson, Margaret Stimmann, and Judith Torney-Purta. International Human Rights, Society, and the Schools. Washington, D.C: National Council for the Social Studies, 1982.
Dyfyniad MLABranson, Margaret Stimmann, and Judith Torney-Purta. International Human Rights, Society, and the Schools. National Council for the Social Studies, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.