Cita APA (7a ed.)

Richards, J. M. (1940). An introduction to modern architecture. Penguin.

Cita Chicago Style (17a ed.)

Richards, James Maude. An Introduction to Modern Architecture. London: Penguin, 1940.

Cita MLA (9a ed.)

Richards, James Maude. An Introduction to Modern Architecture. Penguin, 1940.