Não informado. (1970). Measurement in education. National Council on Measurement in Education.
Citação do estilo Chicago (17ª ed.)Não informado. Measurement in Education. Lansing, Mich: National Council on Measurement in Education, 1970.
Citação MLA (8ª ed.)Não informado. Measurement in Education. National Council on Measurement in Education, 1970.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.