APA (7th ed.) Citation

Kelby, S. (2008). The Adobe Photoshop CS4 book for digital photographers. New Riders.

Chicago Style (17th ed.) Citation

Kelby, Scott. The Adobe Photoshop CS4 Book for Digital Photographers. [Berkeley, Calif.?]: New Riders, 2008.

MLA (8th ed.) Citation

Kelby, Scott. The Adobe Photoshop CS4 Book for Digital Photographers. New Riders, 2008.

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