This tutorial will provide you with information on the types of sources you may be able to include in your argument, how to decide if your sources are credible, and how to make good decisions about using your sources.
Register and log in to Learning Express to access this resource. (See the Register/Log in link below in the left column.) Click on the link to the tutorial and then Unit 5: Editing II. Lesson 1: Perfect Your Punctuation > Commas: Punctuation Yield Signs. You may stop the tutorial and finish later.