Dyfyniad APA

National Association of Elementary School Principals (U.S.). (1980). Principal. National Association of Elementary School Principals.

Dyfyniad Arddull Chicago

National Association of Elementary School Principals (U.S.). Principal. Arlington, Va.: National Association of Elementary School Principals, 1980.

Dyfyniad MLA

National Association of Elementary School Principals (U.S.). Principal. National Association of Elementary School Principals, 1980.

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