Dvorak, John C. (September 12, 1989). Machrone, Bill (ed.). "Inside Track". PC Magazine. Vol. 8, no. 15. Ziff Davis. p. 75. ISSN0888-8507. Retrieved September 29, 2018.
Dvorak, John C. (September 12, 1989). Machrone, Bill (ed.). "Inside Track". PC Magazine. Vol. 8, no. 15. Ziff Davis. p. 75. ISSN0888-8507. Retrieved September 29, 2018.