I am pretty new on Stack Overflow. Normally when I do articles, I do quote people and put in the references. But, not very long time go I put a quote from Wikipedia in an answer to this question, and at the end of it I put (source). I don't know why, but it looks like people just get "mad" because of it.
On Stack Overflow should we not quote others' work?
Any constructive advice on how to give an answer will be appreciated.