APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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