Cita APA (7th ed.)

Osborn, F. J. (1969). Green-belt cities. Evelyn Adams & MacKay.

Cita Chicago (17th ed.)

Osborn, Frederic James. Green-belt Cities. London: Evelyn Adams & MacKay, 1969.

Cita MLA (9th ed.)

Osborn, Frederic James. Green-belt Cities. Evelyn Adams & MacKay, 1969.

Atenció: Aquestes cites poden no estar 100% correctes.