For this class you should use the widest possible array of resources. Statistics, polling data, original research are always appropriate. Magazine and newspaper articles are not considered primary research or scholarly sources. Using a healthy balance of many kinds of sources will enhance your article. Look for multiple perspectives or angles as you consider what to select.
Here is a list of selected databases that cover topics related to communication studies. There are many other databases accessible through Zondervan Library that are not mentioned in this list but may be found on the main ZL page.