Advertising for short term rentals

I'm looking for some cheap advice on the best way  to advertise my apartment for short term rentals (Marbella area).  What's the best UK (or any other)newspapers to advertise in?  Are there any local trustworthy agents?  All advise appreciated. Thanks.

Do a search on Google for "holiday rentals Marbella" or "apartment for rent in Marbella" and see which sites come up top.  The sites on the first page are the ones most likely to generate the most enquiries.

Take a look through them and compare their rates and services.

Justin