Heywood, W. (1921). A history of Pisa, eleventh and twelfth centuries. Cambridge University Press.
Dyfyniad Arddull ChicagoHeywood, William. A History of Pisa, Eleventh and Twelfth Centuries. Cambridge: Cambridge University Press, 1921.
Dyfyniad MLAHeywood, William. A History of Pisa, Eleventh and Twelfth Centuries. Cambridge University Press, 1921.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
