Answers:
1.Magazines
2. A magazine is a collection of articles and images about diverse topics of popular interest and current events. Usually these articles are written by journalists or scholars and are geared toward the average adult.
3.Letters to the editor
4. In general, print publications with authors and listed sources tend to be reliable because they provide sources which readers can verify. ... That a source is in print or posted on the Web does not automatically make it trustworthy. You can always find information on any source.