217231 Ashworth, G. (1973). Encyclopedia of planning. London : Barrie and Jenkins.
Cita Chicago (17th ed.)217231 Ashworth, Graham. Encyclopedia of Planning. London : Barrie and Jenkins, 1973.
Cita MLA (9th ed.)217231 Ashworth, Graham. Encyclopedia of Planning. London : Barrie and Jenkins, 1973.
Atenció: Aquestes cites poden no estar 100% correctes.