The Pong Principle
"Learning to Listen: A Patient Becomes the Teacher By Serving Up Life-Changing Advice
Ellis, Thomas. (February 2011). The Pong Principle. , (), - . Retrieved from http://hdl.handle.net/10342/3615
Ellis, Thomas. "The Pong Principle". . . (), February 2011. September 21, 2018. http://hdl.handle.net/10342/3615.
Ellis, Thomas, "The Pong Principle," , no. (February 2011), http://hdl.handle.net/10342/3615 (accessed September 21, 2018).
Ellis, Thomas. The Pong Principle. . February 2011; (): . http://hdl.handle.net/10342/3615. Accessed September 21, 2018.