Wilson, Johnny L. (November 1991). "A History of Computer Games". Computer Gaming World. No. 88. p. 10. Archived from the original on December 2, 2013. Retrieved November 18, 2013.
Wilson, Johnny L. (November 1991). "A History of Computer Games". Computer Gaming World. No. 88. p. 10. Archived from the original on December 2, 2013. Retrieved November 18, 2013.