Dyfyniad APA

ADVISE. National Association of Secondary School Principals / NASSP.

Dyfyniad Arddull Chicago

ADVISE. National Association of Secondary School Principals / NASSP.

Dyfyniad MLA

ADVISE. National Association of Secondary School Principals / NASSP.

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