Llewellyn, R. (1995). Inside AutoCAD 13 for DOS. New Riders Pub.
Lua i Stíl Chicago (17ú heag.)Llewellyn, Rick. Inside AutoCAD 13 for DOS. Indianapolis, Ind: New Riders Pub, 1995.
Lua MLA (9ú heag.)Llewellyn, Rick. Inside AutoCAD 13 for DOS. New Riders Pub, 1995.
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