Clifford, S. H., & Sawyer, S. C. (1993). Microcomputer essentials. R.D. Irwin.
Lua i Stíl Chicago (17ú heag.)Clifford, Sarah Hutchinson, agus Stacey C. Sawyer. Microcomputer Essentials. Homewood, IL: R.D. Irwin, 1993.
Lua MLA (8ú heag.)Clifford, Sarah Hutchinson, agus Stacey C. Sawyer. Microcomputer Essentials. R.D. Irwin, 1993.
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