APA Citation

 Clarkson, M. (2004).  Photoshop secrets of the pros: 20 top artists and designers face off.  Sybex.

Chicago Style Citation

 Clarkson, Mark.  Photoshop Secrets of the Pros: 20 Top Artists and Designers Face Off.  Sybex, 2004.

MLA Citation

 Clarkson, Mark.  Photoshop Secrets of the Pros: 20 Top Artists and Designers Face Off.  Sybex, 2004.

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