I create all my own images and whenever you use information from another website and put it in your own words, a simple link to the article will suffice. Pick up a physical newspaper one of these days and read the articles in there if you want to learn how to do it properly. It's not necessary to have a "sources" section at the bottom of your article as long as you are linking to the original article that you are getting information from. Also, the only situation where it's necessary to create a "bibliography" like section at the bottom of your article is if you take data or quotes of any kind and use them word for word.