Dyfyniad APA

The Yearbook of the National Council on Measurement in Education. National Council on Measurement in Education.

Dyfyniad Arddull Chicago

The Yearbook of the National Council on Measurement in Education. National Council on Measurement in Education.

Dyfyniad MLA

The Yearbook of the National Council on Measurement in Education. National Council on Measurement in Education.

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