JAMA(Journal of the American Medical Association)
Journal of African American History
Journal of Marriage and Family
The following example of an article on siblings from the Journal of Marriage and Family shows some of the details of what you may find in a scholarly journal:
This website was adapted from many library sites offering a description of the difference between scholarly journals and popular magazines. Some of these sites have very detailed descriptions further dividing periodicals into the above types. University of Central Florida and Winston Salem State University carefully discuss the differences. Check out the following library sites that were used to come up with LPC's description. You may find many other useful sites by searching "journals vs magazines" in a good search engine.
Prevention
Jet
Parents
The following example of an article on siblings from Parents magazine shows some of the details of what you may find in a popular journal:
Periodicals may be further divided up into scholarly journals, trade journals, news and general interest publications, popular magazines, and sensational publications. An example of each follows:
Scholarly - JAMA
Trade Journals - Advertising Age
News/General - Forbes
Popular - People Weekly
Sensational - National Enquirer