APA (7th ed.) Citation

Autodesk, Inc. (1994). AutoCAD release 13: User's guide. Autodesk.

Chicago Style (17th ed.) Citation

Autodesk, Inc. AutoCAD Release 13: User's Guide. [San Rafael, Calif.]: Autodesk, 1994.

MLA (9th ed.) Citation

Autodesk, Inc. AutoCAD Release 13: User's Guide. Autodesk, 1994.

Warning: These citations may not always be 100% accurate.