Peer review (also well known as refereeing) is the process of subjecting an author’s scholarly work, inquiry, or approximations to the scrutiny of others who are experts in the same subject, before a newspaper describing this study is put out in a journal, conference proceedings or as a book. Peer-reviewed journals /books /article was closely studied by a jury of well professional reviewers who are experts on that article topic. The reviewers are just looking for the proper utilization of the research process. For example, by peers in the study of scientists review the fellow scientist, in the medical field researchers only review for the other medical researchers. The reviewers also look for the citation page. Mostly, papers issued in those journals are checked by the expertise and the information are based on the college level research. Some articles like magazines, newspaper, Wikipedia, and etc. are just edited for the spelling and grammar, maybe; but not for the factual articles. I get surprised about the most of the peer-reviewed get rejected lots of times before it gets published. Almost it takes one- two years to get published and for the book, it takes a long time than articles. At my school time, my one to the professor told us that not to use the Wikipedia site because they don’t have the proper information.