Many databases offer the option to search for "peer-reviewed" journal articles - those are academic articles reviewed by the authors' peers for accuracy during the editing and publishing process.
If you are using a database that does not have this filter option, or if you find an article citation somewhere else, you can check if the article was published in a "peer-reviewed" journal or magazine by using Ulrichsweb. Search for your journal or magazine by title and look for a little black and white striped jersey icon next to its name. 
