Scholarly Journals
Articles published in scholarly journals are written by researchers who are experts in their field. People who write for academic journals are employed by colleges, universities, or other institutions of education or research. They submit articles to the editors of the journals, who decide whether or not to publish the article.
Peer-Review Journals
These are the most prestigious academic journals. Articles are subject to the peer-review process. They must be reviewed by several experts before they are accepted for publication. These experts suggest possible changes and recommend to the editor of the journal whether or not to publish the article.
Professional Literature
Articles are written by people working in the field. Articles cover news in the field, brief reports on research and articles about trends. Most publications will have letters to the editor, opinion pieces and advertisement focused on that particular trade, occupation or area of interest.