Lupton, E., Phillips, J. C., & Phillips, J. C. (2015). Graphic design : the new basics (Second edition, revised and expanded). Princeton Architectural Press.
Lidwell, W., Holden, K., Holden, K., Butler, J., & Butler, J. (2010). Universal principles of design : 125 ways to enhance usability, influence perception, increase appeal, make better design decisions, and teach through design (Rev. and updated). Rockport.