Format: 

Lastname, Firstname. Title of Report. Publisher, Day Month Year, URL. Report Number. Database Name or Title of Non-Publisher Website, DOI or URL. Accessed Day Month Year.

Lastname, Firstname. Title of Report. Publisher, Day Month Year, URL or DOI (when accessed from the publisher's website). Report Number. Accessed Day Month Year.

Lastname, Firstname. Title of Report. Publisher, Day Month Year, URL. Report Number.

Examples: 

Foltz, Stuart D., et al. Public Reporting and a More Sustainable Army. United States Army Corps of Engineers, Engineer Research and Development Center, Apr. 2009, www.dtic.mil/dtic/tr/fulltext/u2/a500705.pdf. ERDC/CERL TR-09-11. Accessed Day Month Year.

In-text: (Foltz et al. 43)

Notes: 

Publishers of technical reports often assign reports to a named and numbered series. Include this information at the end of the citation, but before the database information (MLA 53). If citing a report found on the web, include the URL, but omit http:// or https:// from the citation (MLA 110).

Source:

This source type is not covered by the MLA Handbook (8th ed.)