Boolean Logic is a term for the language used to tell databases how to do specific things. The table below outlines the three terms most databases use. Make sure they are typed in all caps when used, otherwise the database will treat them as a normal word.
To copy citation information for articles, eBooks, etc:
From a record's detail view, click the Cite tool icon.
Scroll down until you find MLA style. Copy and paste citation to your Works Cited page.
Click on the title of the resource. In the upper right corner, look for a banner of icons each labeled with a function including "Cite" and this and an icon of a quotation mark. 
Change the option to your citation style of choice and copy and paste the citation to your Works Cited page.