Vitamins

Vitamin A source:
                Milk, butter, cheese, eggs, chicken, fish oils.

Vitamin B complex
                Our body requires B1,B2, Nicotinic acid in small quantities. So we should    
                concentrate on B6, B12 & folic acid.   

                B12 sources:
                Mostly non vegetarian foods like egg, chicken, meat, fish.
                Milk is the only vegetarian food which contains B12.
                The British Vegan Society recommends foods fortified with vitamin B12, such as:
                breakfast cereals, yeast extract, margarine, soya powder and milk, Plamil, soya        
                mince or chunks.

                B6 sources:
                These are similar to B12 ones & is present in vegetarian diet such as  
                vegetables, brown rice,dates,apricots,pulses.

                Folic acid sources:
                Liver contains the best amount of folic acid. White rice, oranges,tomato,pasta also 
                contains good amount of Folic acid.

Vitamin C sources:
                Citrus fruits like lemon, orange, guava, red sweet pepper, kiwi, strawberries & 
                Brussels sprout

Vitamin D sources:
                Primary choice:Egg yolks, seafood oil, beef liver, and wild-caught oily seafood.
                Milk is one of the best source for Vitamin D.
                Sun rays are said to produce vitamin D but info from recent research is due to  
                pollution & temperature, the vitamin produced is not sufficient for the body.

 Vitamin E sources:
                Fortified cereals, almonds, vegetable oils, tomatoes, peanut butter, avocado
  
Vitamin K sources:
                Spinach, cabbage, cauliflower, wheat bran, organ meats, cereals, eggs.

(Source: http://gkenhancer.blogspot.sg/2012/09/best-natural-sources-for-vitamins.html)