The process of peer review means that the journal subjects each article submitted for possible publication to a panel of peers who critique the article and decide if the reseach in it is sound enough to be published in the journal. Usually this process is anonymous on both sides so that there are no persoality conflicts. Usually if a journal is peer reviewed it is scholarly enough to be trustworthy to cite.
MU's A-Z list is a list of the journals that are available in full text. You'll want to check the time frame listed for the journal you need. There are currently 2996 full text pyschology journals available to MU
students. You may want to drill down into a more specific category.