Most library databases have a citation tool in the upper right hand corner of the page you are on. You can choose the correct formal (MLA) and then copy/paste the citation right into your Works Cited page. **Just make sure to double-check the formatting before you submit your paper.
Zotero is a free, easy to use software that helps you collect, manage, and cite research sources.
Zotero allows you to attach PDFs, notes and images to your citations, organize them into collections for different projects, and create bibliographies.