APA (7th ed.) Citation

National Association of Secondary School Principals (U.S.), issuing body. (2009). Principal leadership. National Association of Secondary School Principals.

Chicago Style (17th ed.) Citation

National Association of Secondary School Principals (U.S.), issuing body. Principal Leadership. Reston, Va.: National Association of Secondary School Principals, 2009.

MLA (9th ed.) Citation

National Association of Secondary School Principals (U.S.), issuing body. Principal Leadership. National Association of Secondary School Principals, 2009.