What type of article have you found?
The categories are not rigid; some of them overlap. Here are some characteristics to help identify an article type:
Peer reviewed (or Refereed):
Technical reports: (not peer reviewed)
Trade publication articles: (not peer reviewed)
Websites, press releases, encyclopedia entries:
How do you find a specific journal article from the catalog?
You will need to know the Journal Title, Publication Date, and Author and/or Title of the article.