Empirical articles include research that derives its data by means of direct observation of experiment. This type of research is often published in peer-reviewed journals/scholarly journals. Here's an example of an empirical article.
Theoretical articles do not contain experimental/research data. Instead, authors draw upon existing research to form a new theory or explore theories in a new way. This type of scholarship is also published in peer-reviewed journals/scholarly journals. Here's an example of a theoretical article.
Review articles are an attempt by one or more writers to write a summation of the current state of research on a particular topic or an area of research. These articles are also often published in peer-reviewed journals/scholarly journals. Here's an example of a review article.
Peer-reviewed journals have a peer-review board (experts in the field) that select, review, and approve articles for inclusion in a journal.
Gallucci, A. R., Martin, R. J., & Morgan, G. B. (2016). The consumption of energy drinks among a sample of college students and college student athletes. Journal of Community Health, 41(1), 109-118. doi:http://dx.doi.org.ezpro.cc.gettysburg.edu:2048/10.1007/s10900-015-0075-4
Beedie, C. J. (2010). All in the mind? Pain, placebo effect, and ergogenic effect of caffeine in sports performance. Open Access Journal of Sports Medicine, 1, 87-94. doi:http://dx.doi.org.ezpro.cc.gettysburg.edu:2048/10.2147/OAJSM.S6932
Cole, R. J., Oliver, A., & Blaviesciunaite, A. (2014). The changing nature of workplace culture. Facilities, 32(13), 786-800. doi:http://dx.doi.org.ezpro.cc.gettysburg.edu:2048/10.1108/F-02-2013-0018
Here are a couple of resources that provide helpful guidelines for writing a literature review: