Cita APA (7a ed.)

Gregory, R. L. (1970). The intelligent eye. Weidenfeld & Nicolson.

Cita Chicago Style (17a ed.)

Gregory, R. L. The Intelligent Eye. London: Weidenfeld & Nicolson, 1970.

Cita MLA (9a ed.)

Gregory, R. L. The Intelligent Eye. Weidenfeld & Nicolson, 1970.