Butlin, R. A. (1993). Historical geography: Through the gates of space and time. Arnold.
Dyfyniad Arddull ChicagoButlin, Robin A. Historical Geography: Through the Gates of Space and Time. London: Arnold, 1993.
Dyfyniad MLAButlin, Robin A. Historical Geography: Through the Gates of Space and Time. Arnold, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.