Many interfaces allow you to pull citation information directly from the search results. This is a great place to start, but check a style manual for accuracy. The citation you pull may not always be correct.
To get formatted citations from any database
Many databases have a Cite link that will display an article's citation in one of many citation styles. Look for it when viewing the details of an article. The icon is usually quotation marks.
Many students who are conducting research for topical papers find that manually tracking references and using a citation generator is sufficient. While researchers often find that when they are doing extensive research or studying a topic for a length of time that a citation management tool is worth the investment in learning how to use the software.