Just noticed that you're referencing your sources incorrectly for English :-)
Oxford is just the company and/or place of publishing. It should have said:
Reaney* has:
MONDON: > MUNDON, from the place-name M. in Essex
Mills** : MUNDON: "protection hill", i.e. probably "raised ground safe from flooding, or protected by fencing"; Old English "mund" + "dun"
* P.H.Reaney, A Dictionary of Surnames, Oxford 1997
** A.D.Mills, Dictionary of Place-names, Oxford 1998
Or even
Reaney 1997* and
Mills 1998**
That's how it's done in English - you reference the author, not the publisher.
:-)