Most library-subscribed resources (OneSearch; EBSCO databases; JSTOR; etc.) offer an option to create a citation for you, in the style of your choice. You may also be familiar with a variety of citation generators that are available freely online.
When using any of these automatic citation generators, please be aware that they are only as good as the information provided to them (by you, or by the metadata in the database). They should always be double-checked against your knowledge of how to cite.