Citazione Stile APA (7a Edizione)

(1993). Leadership in middle level education. National Association of Secondary School Principles.

Citazione stile Chigago Style (17a edizione)

Leadership in Middle Level Education. Reston: National Association of Secondary School Principles, 1993.

Citatione MLA (9a ed.)

Leadership in Middle Level Education. National Association of Secondary School Principles, 1993.