Heller, S. (2015). Graphic style lab: Develop your own style with 50 hands-on exercises. Rockport Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHeller, Steven. Graphic Style Lab: Develop Your Own Style with 50 Hands-on Exercises. Beverly, Massachusetts: Rockport Publishers, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHeller, Steven. Graphic Style Lab: Develop Your Own Style with 50 Hands-on Exercises. Rockport Publishers, 2015.
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