How did the Roman emperor commodus come to power

How should the student cite this source using mla citation format?

Which of the best following describes william jennings bryan’s learning experience

23. how does specialization among nations encourage interdependence? nations work together to share labor and resources to produce vital goods. nations sign treaties prohibiting taxes on imports. nations produce specific goods and then trade to obtain things they need. nations that are more developed agree to fund development in nations with limited industry.