Enfield, Richard P. (2001, Winter). Connections between 4-H and John Dewey’s philosophy of education. Focus, The University of California, Davis
Hinn, D. Michelle, Twidale, Michael B., & Wang, Xiaohui C. (2004). Collaborative learning of computer applications in the contexts of work, learning and play. GSLIS Technical Report. ISRN UIUCLIS–2004/2 CSCW. ICALT 2004.
Osborne, Margery D., & Brady, D. J. (2001). Constructing a space for developing a rich understanding of science through play. Journal of Curriculum Studies, 33(5), 511-524.
Wigginton, E. (1989). Foxfire grows up. Harvard Educational Review, 59(1):24-49.