Archer, J. (1991). As the crow flies. HarperCollins, Coronet Books.
Dyfyniad Arddull ChicagoArcher, Jeffrey. As the Crow Flies. New York : Hodder: HarperCollins, Coronet Books, 1991.
Dyfyniad MLAArcher, Jeffrey. As the Crow Flies. HarperCollins, Coronet Books, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.