1. Adler, A. (1958). What life should mean to you. New York, NY: Capricorn Books.
2. Alacapinar, F. G. (2013). Grade level and creativity. Eurasian Journal of Educational Research, 50, 247–266.
3. Arias-Carrión, O., Stamelou, M., Murillo-Rodríguez, E., Menéndez-González, M., & Pöppel, E. (2010). Dopaminergic reward system: A short integrative review. International Archives of Medicine, 3, 3–24.
4. Beers, S. Z. (2011). Teaching 21
st
century skills. Alexandria, VA: ASCD Publications.
5. Bell, L., & Schniedewind, N. (1989). Realizing the promise of humanistic education: A reconstructed pedagogy for personal and social change. Journal of Humanistic Psychology, 29, 200–223.