ទំព័រគំរូ:R:OCD2
Christine A. Lindberg (editor), The Oxford College Dictionary, 2nd edition (Spark Publishing, 2007 [2002], ISBN 978-1-4114-0500-4)
Christine A. Lindberg (editor), The Oxford College Dictionary, 2nd edition (Spark Publishing, 2007 [2002], ISBN 978-1-4114-0500-4)