APA (7th ed.) Citation

Gulbins, J. (2013). Mastering Photoshop layers: A photographer's guide. Rocky Nook, Inc.

Chicago Style (17th ed.) Citation

Gulbins, Jürgen. Mastering Photoshop Layers: A Photographer's Guide. Santa Barbara, CA: Rocky Nook, Inc, 2013.

MLA (9th ed.) Citation

Gulbins, Jürgen. Mastering Photoshop Layers: A Photographer's Guide. Rocky Nook, Inc, 2013.

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