Lardner, J., & Roberts, P. (2012). The digital art technique manual: For illustrators & artists : the essential guide to creating digital illustration and artworks using Photoshop, Illustrator, and other software (1st edition for North America.). Barron's.
Chicago Style (17th ed.) CitationLardner, Joel, and Paul Roberts. The Digital Art Technique Manual: For Illustrators & Artists : The Essential Guide to Creating Digital Illustration and Artworks Using Photoshop, Illustrator, and Other Software. 1st edition for North America. Hauppage, NY: Barron's, 2012.
MLA (9th ed.) CitationLardner, Joel, and Paul Roberts. The Digital Art Technique Manual: For Illustrators & Artists : The Essential Guide to Creating Digital Illustration and Artworks Using Photoshop, Illustrator, and Other Software. 1st edition for North America. Barron's, 2012.