Hepworth, M. E. (1989). Geography of the information economy. London: Belhaven Press.
Trích dẫn kiểu ChicagoHepworth, Mark E. Geography of the Information Economy. London: Belhaven Press, 1989.
MLA引文Hepworth, Mark E. Geography of the Information Economy. London: Belhaven Press, 1989.
警告：这些引文格式不一定是100％准确.