1. Aguilar, T. E. (1985). Social and environmental barriers to playfulness. In J. L. Frost & S. Sunderlein (Eds.), When children play: Proceedings of the international conference on play and play environments. Wheaton, MD: Association for Childhood Education International.
2. Ahmed, S. (2004). The cultural politics of emotion. Edinburgh: Edinburgh University Press.
3. Al-Beraidi, A., & Rickards, T. (2003). Creative team climate in an international accounting office: An exploratory study in Saudi Arabia. Managerial Auditing Journal, 18(1), 7–18.
4. Amabile, T. M. (1996). Creativity in context. Boulder, CO: Westview Press.
5. Amir, O., Biederman, I., Wang, Z., & Xu, X. (2015). Ha Ha! Versus Aha! A direct comparison of humor to nonhumorous insight for determining the neural correlates of mirth. Cerebal Cortex, 25(5), 1405–1413.