Dyfyniad APA

Condition of Education, 1999: Overview. US Department of Education.

Dyfyniad Arddull Chicago

Condition of Education, 1999: Overview. US Department of Education.

Dyfyniad MLA

Condition of Education, 1999: Overview. US Department of Education.

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