Ruben, B. D., The What and Why of Gaming: A Taxonomy of Experiential Learning Systems,Proceedings of the 12th Annual Symposium of the National Gaming Council and the 4th Annual Conference of the International Simulation and Gaming Association. Washington, DC: U.S. Government Printing Office, 1974, 40-55. (A)

Proceedings of the 12th Annual Symposium of the National Gaming Council and the 4th Annual Conference of the International Simulation and Gaming Association