In order to properly cite a journal article, you need the following information:
1. Author(s) name
2. Title of Article
3. Title of Journal (the publication)
4. The Volume (and Issue, sometimes listed as No. or Number)
5. The Date published (at least the year, and the month if it is listed)
6. The Page Number Range (i.e. 4-19).
All of this information will be found in a variety of places - examples are below: