Não informado. (1968). Journal of Educational Measurement. National Council on Measurement in Education.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Educational Measurement. Washington: National Council on Measurement in Education, 1968.
Lua MLA (8ú heag.)Não informado. Journal of Educational Measurement. National Council on Measurement in Education, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.