Good protein sources :

Fish (tuna, mackeral, sardines etc)
Meat (Chicken, Turkey, Lean beef/steak)
Dairy products (milk, eggs, cheese, yoghurt)

The above are all good sources as they contain the 8 essential amino acids that the body cant produce.

Other high sources, which don't contain all 8 aminos, but can be combined with other proteins to make up the deficit

Nuts (cashews, almonds, peanuts etc)
Beans/pulses