Cita APA (7th ed.)

Needham, B. (1977). How cities work: An introduction. Pergamon Press.

Cita Chicago (17th ed.)

Needham, Barrie. How Cities Work: An Introduction. Oxford: Pergamon Press, 1977.

Cita MLA (9th ed.)

Needham, Barrie. How Cities Work: An Introduction. Pergamon Press, 1977.