Here's the sample citation that ProQuest offers using their Cite This link:
"United States Infrastructure Report - Q4 2011. " United States Infrastructure Report 1 Oct. 2011: ABI/INFORM Trade & Industry, ProQuest. Web. 14 Nov. 2011.
First item in quotes is the report/article title. Second part in italics is the name of the journal/periodical. First date is the date the report/article was published. Next is the database name, followed by the vendor (ProQuest). Web just identifies that this is an online source. The last date is the date I accessed the report.
Also, the second line should be indented about five spaces.
Once I clicked on the full-text PDF link for this report, there is a link in the top left corner that says "Cite this" (right beside the e-mail and copy links). When you click on it, it will show you the MLA citation for that document.
