APA (7th ed.) Citation

Barker, C. (2009). Photoshop CS4 for beginners (1st edition.). Peachpit Press.

Chicago Style (17th ed.) Citation

Barker, Corey. Photoshop CS4 for Beginners. 1st edition. [Berkeley, Calif.]: Peachpit Press, 2009.

MLA (9th ed.) Citation

Barker, Corey. Photoshop CS4 for Beginners. 1st edition. Peachpit Press, 2009.

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