1. Apple, M. W., & Beane, J. A. (2007a). Schooling for democracy. Principal Leadership, 8(2), 34–38.
2. Apple, M. W., & Beane, J. A. (Eds.). (2007b). Democratic schools: Lessons in powerful education (2nd ed.). Portsmouth, NH: Heinemann.
3. Bezzina, C. (2006). “The road less traveled”: Professional communities in secondary schools. Theory Into Practice, 45(2), 159–167.
4. Bryk, A., Camburn, E., & Louis, K. S. (1999). Professional community in Chicago elementary schools: Facilitating factors and organizational consequences. Educational Administration Quarterly, 35 (supplemental), 751–781.
5. DuFour, R. (2004). What is a professional learning community? Educational Leadership, 61(8), 6–11.