Dyfyniad APA

American Society of Educators. (1991). School executive. American Society of Educators.

Dyfyniad Arddull Chicago

American Society of Educators. School Executive. Philadelphia, Pa.: American Society of Educators, 1991.

Dyfyniad MLA

American Society of Educators. School Executive. American Society of Educators, 1991.

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