Cullingworth, B. (2014). Planning in the USA: Policies, issues and processes. Riutledge.
Citazione stile Chigago Style (17a edizione)Cullingworth, Barry. Planning in the USA: Policies, Issues and Processes. London: Riutledge, 2014.
Citatione MLA (9a ed.)Cullingworth, Barry. Planning in the USA: Policies, Issues and Processes. Riutledge, 2014.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.