APA引文

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

芝加哥风格引文

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

MLA引文

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

警告:这些引文格式不一定是100%准确.