Não informado. (1999). Shools in the middle. National Association of Secondary School Principals.
Cita Chicago Style (17a ed.)Não informado. Shools in the Middle. Reston, Va: National Association of Secondary School Principals, 1999.
Cita MLA (8a ed.)Não informado. Shools in the Middle. National Association of Secondary School Principals, 1999.
Precaución: Estas citas no son 100% exactas.