@article entry type is definitely the right one for citing newspaper articles.
As you can read in the
An article in a journal, magazine, newspaper, or other periodical which forms
a self-contained unit with its own title. The title of the periodical is given in
journaltitle field. If the issue has its own title in addition to the main
title of the periodical, it goes in the
issuetitle field. Note that
related fields refer to the journal while
translator and related fields refer
to the article.
Fields can be different if you don't use
biblatex, but the concept is the same.