Filters to Select from the left menu:
Source Type: Newspapers
Publication Date: Using a date range will help you select articles that best address your issue
Document Type: Clicking on More will let you Include News, Article, and Feature and allow you to Exclude other types of content -- Be on the look out for Editorials, Commentary, From the Right, and other Op-Ed pieces.
Publication Title: Remember to pay attention to the bias of the source itself. Is the paper neutral and known for fact reporting - or is the publication intentionally reporting with a liberal or conservative voice?
Get instructions for APA citation style from Purdue Online Writing Lab
You can also get assistance at the TAMU-CC Writing Center. Here's their Basic Formatting Guide
Don't forget to look for citations for the articles you find in the library's databases. Most online resources will offer citations in a variety of styles!