Here are some tips you can follow:

1. Get involved, make friends with the troublemakers.
2. Document your time. When you are subject to colleagues' political tactics – such as taking credit for your work – it's important not to retaliate.
3. Make sure you don't sink to their level.
4. Change the culture from within.
5. Go it alone. Ditch the co-workers entirely by working for yourself if you tried everything but still don't work.