"BROTHER" brand labellers are always a reliable choice and they are really easy to use. I have a Brother Labeller PT-D400AD. You can easily get them at any major book/stationary store like Popular Bookstore.
I am using this DYMO brand. Very good and user friendly. http://list.qoo10.sg/item/1-YEAR-WARRANTY-DYMO-LABELMANAGER-160-BATTERY-OPERATED-PORTABLE/423491322
I get those stickers labels