Bill, G., & Snow, A. (2001). Dirty dog. Cambridge University Press.
Dyfyniad Arddull ChicagoBill, Gillham, and Alan Snow. Dirty Dog. Cambridge: Cambridge University Press, 2001.
Dyfyniad MLABill, Gillham, and Alan Snow. Dirty Dog. Cambridge University Press, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.