Remember to use only articles as specified by your professor in your work, for example, the author of any article you reference should be an anthropologist!
The articles you find on AnthroSource articles will usually be by anthropologists, but you should always double check. With the other databases listed (Anthropology Plus, etc), some articles are by anthropologists and some may not be, so remember to look.
There are some good ways to tell.
Academic journals are subject-specific and may focus on specific topics within a broader discipline. Because databases are more broadly focused, you may want to look at one of these subject-specific journals when doing research on your topic as well.
Annual Review of Anthropology
Journal of the Royal Anthropological Institute (JRAI)
Journal of Material Culture