They may include news, opinion, editorial comments, scholarly analysis and research. They range from newsletters of trade organizations to in-depth journals published by scientific societies and university presses. Scholarly journals are written for a specialized audience in a dry manner and using technical jargon. Articles normally include an abstract, a description of methodology, footnotes, and bibliography. Popular journals are written for a general audience using common terminology.
Articles are easily understandable to the general population.
Peer reviewed or refereed journals are scholarly journals where the quality of the articles is maintained by a review process by experts prior to publication. The article submitted to refereed or peer reviewed journals are examined by one or more people with expertise in the field with which the article deals. The purpose of this is to give some assurance that the information in the article is valid. Trade journals are serials that fall in between the categories of magazines and journals, but their focus includes more product and business information. Primary sources are first hand accounts, original works, or original research, published in either paper or electronic formats.