Norton, Peter (1986): . New York. Brady. ISBN 0-89303-583-1. 12. august 1981 press release announcing the IBM PC (PDF). Mueller, Scott (1992): , Que Books, ISBN 0-88022-856-3 Chposky, James; Ted Leonsis (1988): . Facts On File. ISBN 0-8160-1391-8. IBM (1983): . IBM Part Number 6936831. IBM (1984): . IBM Part Numbers 6936571 and 1502332. IBM (1986): . IBM Part Number 68X2523.