Illusion in nature and art

MLA

Gregory, R.L, and E.H Gombrich. Illusion In Nature and Art. London: Gerald Duckworth, 1973.

APA

Gregory, R., & Gombrich, E. (1973). Illusion in nature and art. London: Gerald Duckworth.

Chicago

Gregory, R.L., and E.H Gombrich. Illusion In Nature and Art. London: Gerald Duckworth, 1973.