APA (7th ed.) Citation

Goelker, K., Rossbach, G., & Cloot, J. (2013). GIMP 2.8 for photographers: Image editing with open source software (First edition.). Rocky Nook.

Chicago Style (17th ed.) Citation

Goelker, Klaus, G. Rossbach, and Jeremy Cloot. GIMP 2.8 for Photographers: Image Editing with Open Source Software. First edition. Santa Barbara, California: Rocky Nook, 2013.

MLA (9th ed.) Citation

Goelker, Klaus, et al. GIMP 2.8 for Photographers: Image Editing with Open Source Software. First edition. Rocky Nook, 2013.