Butlin, R. A. (1993). Historical geography: Through the gates of space and time. Arnold.
Citazione stile Chigago Style (17a edizione)Butlin, Robin A. Historical Geography: Through the Gates of Space and Time. London: Arnold, 1993.
Citatione MLA (9a ed.)Butlin, Robin A. Historical Geography: Through the Gates of Space and Time. Arnold, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.