Toynbee, A. J. (1966). Change and habit: The challenge of our time. Oxford University.
Dyfyniad Arddull ChicagoToynbee, Arnold J. Change and Habit: The Challenge of Our Time. London: Oxford University, 1966.
Dyfyniad MLAToynbee, Arnold J. Change and Habit: The Challenge of Our Time. Oxford University, 1966.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.