APA (7th ed.) Citation

Heller, S., & Pettit, E. (2000). Graphic design timeline: A century of design milestones. Allworth Press.

Chicago Style (17th ed.) Citation

Heller, Steven, and Elinor Pettit. Graphic Design Timeline: A Century of Design Milestones. New York: Allworth Press, 2000.

MLA (9th ed.) Citation

Heller, Steven, and Elinor Pettit. Graphic Design Timeline: A Century of Design Milestones. Allworth Press, 2000.