APA (7th ed.) Citation

Pruitt, J., & Pruitt, R. (1999). SAMS teach yourself GIMP in 24 hours. SAMS.

Chicago Style (17th ed.) Citation

Pruitt, Joshua, and Ramona Pruitt. SAMS Teach Yourself GIMP in 24 Hours. Indianapolis, Ind.: SAMS, 1999.

MLA (9th ed.) Citation

Pruitt, Joshua, and Ramona Pruitt. SAMS Teach Yourself GIMP in 24 Hours. SAMS, 1999.