Gaya APA

Onstott, S. (2012). AutoCAD 2013 and AutoCAD LT 2013 Essentials . Indianapolis: John Wiley & Sons, Inc..

Gaya MLA

Onstott, Scott. "AutoCAD 2013 and AutoCAD LT 2013 Essentials". Indianapolis: John Wiley & Sons, Inc., 2012. Text.