Zeegen, L. (2009). What is illustration?: Essential design handbooks. RotoVision SA.
芝加哥风格引文Zeegen, Lawrence. What Is Illustration?: Essential Design Handbooks. UK: RotoVision SA, 2009.
MLA引文Zeegen, Lawrence. What Is Illustration?: Essential Design Handbooks. RotoVision SA, 2009.
警告：这些引文格式不一定是100％准确.