Cita APA (7a ed.)

Walters, N., & Bromham, J. (1970). Principles of perspective. Architectural pres.

Cita Chicago Style (17a ed.)

Walters, Nigel, y John Bromham. Principles of Perspective. London: Architectural pres, 1970.

Cita MLA (9a ed.)

Walters, Nigel, y John Bromham. Principles of Perspective. Architectural pres, 1970.