Dyfyniad APA

(1989). Educational measurement. New York: American Council Education.

Dyfyniad Arddull Chicago

Educational Measurement. New York: American Council Education, 1989.

Dyfyniad MLA

Educational Measurement. New York: American Council Education, 1989.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.