(2012). [Title not supplied] (First published 2012.). Oxford University Press.
Dyfyniad Arddull Chicago[Title Not Supplied]. First published 2012. Great Clarendon Street, Oxford: Oxford University Press, 2012.
Dyfyniad MLA[Title Not Supplied]. First published 2012. Oxford University Press, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.