Johnson, N. (1989). AutoCAD: The complete reference. Osborne McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Johnson, Nelson. AutoCAD: The Complete Reference. Berkeley, Calif: Osborne McGraw-Hill, 1989.
Lua MLA (9ú heag.)Johnson, Nelson. AutoCAD: The Complete Reference. Osborne McGraw-Hill, 1989.
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