Não informado. (1994). Journal of Educational and Behavioral Statistics. American Educational Research Association.
Citação do estilo Chicago (17ª ed.)Não informado. Journal of Educational and Behavioral Statistics. Washington: American Educational Research Association, 1994.
Citação MLA (8ª ed.)Não informado. Journal of Educational and Behavioral Statistics. American Educational Research Association, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.