APA (7th ed.) Zitazioa
Bell, L., Bush, T., & Middlewood, D. (2010). The principles of educational leadership and management (2nd ed.). Sage.
Chicago Style (17th ed.) Zitazioa
Bell, Les, Tony Bush, eta David Middlewood. The Principles of Educational Leadership and Management. 2nd ed. Los Angeles: Sage, 2010.
MLA (9th ed.) Zitazioa
Bell, Les, et al. The Principles of Educational Leadership and Management. 2nd ed. Sage, 2010.
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