APA (7th ed.) Citation

Gregory, R. L., Gombrich, E. H., & Blakemore, C. (1980). Illusion in nature and art. Duckworth.

Chicago Style (17th ed.) Citation

Gregory, R. L., E. H. Gombrich, and Colin Blakemore. Illusion in Nature and Art. London: Duckworth, 1980.

MLA (9th ed.) Citation

Gregory, R. L., et al. Illusion in Nature and Art. Duckworth, 1980.