Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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