You will save yourself a lot of time and trouble by copying preformatted citations from various databases. Many, but not all, databases will offer a citation formatted according to MLA. Look for a link or icon called "cite", or "citation", or sometimes just a quotemark ("). Always check your preformatted citations against the MLA 8th edition cheatsheet, because the citations are done by computer, not by a human.
Here is an example from the EbscoHost database showing the citation icon at the far right-hand side:
Click on the "Cite" icon, then choose "MLA":
After copying and pasting the citation into your Works Cited page, you would check the citation against the MLA cheatsheet to verify that it is correct.