Most databases will have a tab or link in a record that formats the information for the article or book into APA Style from which you can copy and paste. Again, it's always a good idea to check carefully what it is you get from this. This is particularly true when you use the database LexisNexis Academic, which seems to cause the most problems with the citations it generates.
ZoterBib is a free tool that helps you build a bibliography instantly from any computer or device.
Chicago Manual of Style Online is the online version of the manual along with some FAQ's.