Protheroe, N. (2005). Principal leadership for school improvement. Educational Research Service.
Chicago-Zitierstil (17. Ausg.)Protheroe, Nancy. Principal Leadership for School Improvement. Arlington, Va: Educational Research Service, 2005.
MLA-Zitierstil (9. Ausg.)Protheroe, Nancy. Principal Leadership for School Improvement. Educational Research Service, 2005.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.