Tolong jelaskan mengenai Encyclopedia: Play Science Scholarpedia dari Bermain

Huizinga, J. (1955). Homo ludens; a study of the play-element in culture. Boston: Beacon Press.

Jenkinson, Sally (2001). The Genius of Play. Hawthorn Press

Sutton-Smith, B. (1997). The ambiguity of play. Cambridge: Harvard University Press.

Burghardt, Gordon M. The Genesis of Animal Play: Testing the Limits

Wenner, M. (2009). "The Serious Need for Play" – Free, imaginative play is crucial for normal social, emotional and cognitive development. It makes us better adjusted, smarter and less stressed, Scientific American.

Gray, P. (2013). Free to Learn: Why Unleashing the Instinct to Play Will Make Our Children Happier, More Self-Reliant, and Better Students for Life

Gray, P. (2008–2009). "Social Play and the Genesis of Democracy", "The Value of Play I: The Definition of Play Provides Clues to Its Purposes", "The Value of Play II: How Play Promotes Reasoning in Children and Adults", "The Value of Play III: Children Use Play to Confront, not Avoid, Life's Challenges and Even Life's Horrors", "The Value of Play IV: Play is Nature's Way of Teaching Us New Skills", "How to Ruin Children's Play: Supervise, Praise, Intervene", Psychology Today.

Howard Taras, (2009). Journal of School Health. Physical Activity and School Performance. 75 (6), pp. 214–218

Kortmulder, Koenraad (1998). Play and Evolution: Second Thoughts on the Behaviour of Animals,

Piaget, J. (1962). Play, dreams and imitation (Vol. 24). New York: Norton

Bateson, Gregory. (1955). A theory of play and fantasy. Psychiatric research reports,2(39), 39–51. Reprinted in Steps to an Ecology of Mind, 1972. Chandler, and 2000, University of Chicago Press.

Stebbins, Robert A. (2015). The Interrelationship of Leisure and Play: Play as Leisure, Leisure as Play. Houndmills, UK: Palgrave Macmillan.