Johnson, D. (1999). Upgrading & repairing your PC answers! McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnson, Dave. Upgrading & Repairing Your PC Answers! McGraw-Hill, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJohnson, Dave. Upgrading & Repairing Your PC Answers! McGraw-Hill, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.