Check the Online Writing Lab (OWL) at Purdue University for information on citing references in MLA style. Information below is from the OWL site.
Cite articles from online databases (e.g. Nexis, ProQuest, JSTOR, ScienceDirect) and other subscription services as containers. Thus, provide the title of the database italicized before the DOI or URL. If a DOI is not provided, use the URL instead. Provide the date of access if you wish.
Alonso, Alvaro, and Julio A. Camargo. "Toxicity of Nitrite to Three Species of Freshwater Invertebrates." Environmental
Toxicology, vol. 21, no. 1, 3 Feb. 2006, pp. 90-94. Wiley Online Library, doi:10.1002/tox.20155.
Langhamer, Claire. “Love and Courtship in Mid-Twentieth-Century England.” Historical Journal, vol. 50, no. 1, 2007,
pp. 173-96. ProQuest, doi:10.1017/S0018246X06005966. Accessed 27 May 2009.