When creating an outline, where should you include supporting material?

When creating an outline, where should you include supporting material? Bullet points should be found in each section allowing the supporting material to be broken into larger details to use as starting points for smaller details when the paper gets written. The supporting material books and sites that were used will go on the works cited page. 

underneath each main point

Ihear he caught ligma

Answer//no one seller can influence the price of the market;