Databases create citations for you! Follow these instructions to find citations on sources, but be sure to check them for accuracy! Other databases generally place citations in the same places as these two.
EBSCOhost
Click on the title of any resource, then click on the yellow paper "cite" icon 
Scroll down until you find MLA style. Copy and paste citation to your Works Cited page.
Gale
Click on the title of the resource. In the upper right corner, find the "Tools" menu and click 
Change the option to MLA and copy and paste the citation to your Works Cited page. Note: Do not copy the URL.