APA (7th ed.) Citation

Galer, M., & Andrews, P. (2009). Photoshop CS4: A guide to creative image editing. Elsevier/Focal Press.

Chicago Style (17th ed.) Citation

Galer, Mark, and Philip Andrews. Photoshop CS4: A Guide to Creative Image Editing. Amsterdam, Boston, London: Elsevier/Focal Press, 2009.

MLA (9th ed.) Citation

Galer, Mark, and Philip Andrews. Photoshop CS4: A Guide to Creative Image Editing. Elsevier/Focal Press, 2009.