APA (7th ed.) Citation

Robles, G. (2013). Sketchbook Pro digital painting essentials. Packt Publishing.

Chicago Style (17th ed.) Citation

Robles, Gil. Sketchbook Pro Digital Painting Essentials. Birmingham: Packt Publishing, 2013.

MLA (9th ed.) Citation

Robles, Gil. Sketchbook Pro Digital Painting Essentials. Packt Publishing, 2013.

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