Não informado. (1976). Educational Research Quarterly. University of Southern California, School of Education.
Citação do estilo Chicago (17ª ed.)Não informado. Educational Research Quarterly. Los Angeles, Calif: University of Southern California, School of Education, 1976.
Citação MLA (8ª ed.)Não informado. Educational Research Quarterly. University of Southern California, School of Education, 1976.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.