Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Richards, J. M. An Introduction to Modern Architecture. Harmondsworth: Penguin, 1940.

Cita MLA (8th ed.)

Richards, J. M. An Introduction to Modern Architecture. Penguin, 1940.