Não informado. (1959). Current literature. National Foundation, Department of Professional Education.
Citação do estilo Chicago (17ª ed.)Não informado. Current Literature. New York: National Foundation, Department of Professional Education, 1959.
Citação MLA (8ª ed.)Não informado. Current Literature. National Foundation, Department of Professional Education, 1959.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.