1. Aber, J. L., Brown, J. L., & Jones, S. M. (2003). Developmental trajectories toward violence in middle childhood: Course, demographic differences, and response to school-based intervention. Developmental Psychology, 39(2), 324–348. https://doi.org/10.1037/0012-1649.39.2.324
2. Al-Smadi, R. T. (2008). Professional development for peace: Linking all types of teachers to international, cross-cultural education. In J. Lin, E. J. Brantmeier, & C. Bruhn (Eds.), Transforming education for peace (pp. 45–66). Charlotte, NC: Information Age Publishing (IAP).
3. Alton-Lee, A. (2003). Quality teaching for diverse students in schooling: Best evidence synthesis. Wellington, NZ: Ministry of Education.
4. Andersson, I., Johansson, R., Zaleskiene, I., Virta, A., & Ahonen, S. (2011). Peace education: Today in the context of yesterday. Swedish, Lithuanian and Finnish perspectives. CiCe. http://www.cicea.eu/pdfs/research_grant_2009-2010_peace_education.pdf
5. Aspin, D. (1987). The epistemological status of “peace studies” (Vol. 11). Canberra: Peace Research Centre, Australia National University.