Willows, D. M., & Houghton, H. A. (1987). The psychology of illustration. Springer.
Chicago Style (17th ed.) CitationWillows, Dale M., and Harvey A. Houghton. The Psychology of Illustration. New York [etc.]: Springer, 1987.
MLA (9th ed.) CitationWillows, Dale M., and Harvey A. Houghton. The Psychology of Illustration. Springer, 1987.
Warning: These citations may not always be 100% accurate.