APA (7th ed.) Citation

Greenberg, A. D., & Greenberg, S. Photoshop 6: The complete reference.

Chicago Style (17th ed.) Citation

Greenberg, Adele Droblas, and Seth Greenberg. Photoshop 6: The Complete Reference.

MLA (8th ed.) Citation

Greenberg, Adele Droblas, and Seth Greenberg. Photoshop 6: The Complete Reference.

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