Clark, G. (1992). Space, time, and man: A prehistorian's view. Cambridge University Press.
Dyfyniad Arddull ChicagoClark, Grahame. Space, Time, and Man: A Prehistorian's View. Cambridge: Cambridge University Press, 1992.
Dyfyniad MLAClark, Grahame. Space, Time, and Man: A Prehistorian's View. Cambridge University Press, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.