- Cambridge Klett Pocket
- Oxford Pocket
- Cambridge Klett Compact
- Cambridge Essential English Dictionary (monolingual)
- Oxford Wordpower (monolingual)
Most of these dictionaries include a CD with the electronic version for your PC.
2. VOCABULARY REFERENCE
- English Vocabulary In Use - Elementary, with CD- ROM (Felicity O'Dell and Michael McCarthy, Cambridge University Press)
This book is organised in topics and the CD includes games, tests and other practical material that can be very useful for your learning.
3. GRAMMAR REFERENCE
- Essential Grammar in Use, with CD-Rom (Raymond Murphy, Cambridge University Press) (There's also a SPANISH EDITION, with texts in Spanish)
- The Good Grammar Book (Michael Swan and Catherine Walter, Oxford)