Smith, D. (1989). North and south: Britain's economic, social and political divide. Penguin.
Citazione stile Chigago Style (17a edizione)Smith, David. North and South: Britain's Economic, Social and Political Divide. London: Penguin, 1989.
Citatione MLA (9a ed.)Smith, David. North and South: Britain's Economic, Social and Political Divide. Penguin, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.