Não informado. (1968). Journal of Educational Measurement. National Council on Measurement in Education.
Chicago-referens (17:e uppl.)Não informado. Journal of Educational Measurement. Washington: National Council on Measurement in Education, 1968.
MLA-referens (8:e uppl.)Não informado. Journal of Educational Measurement. National Council on Measurement in Education, 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.