What is the correct mla style to cite an article from the online databases?

Information from the URL in the related links:

Basic Style for Citations of Electronic Sources (Including Online Databases):

Here are some common features you should try and find before citing electronic sources in MLA style. Not every Web page will provide all of the following information. However, collect as much of the following information as possible both for your citations and for your research notes:

• Author and/or editor names (if available)
• Article name in quotation marks (if applicable)
• Title of the Website, project, or book in italics. (Remember that some Print publications have Web publications with slightly different names. They may, for example, include the additional information or otherwise modified information, like domain names [e.g. .com or .net].)
• Any version numbers available, including revisions, posting dates, volumes, or issue numbers.
• Publisher information, including the publisher name and publishing date.
• Take note of any page numbers (if available).
• Medium of publication.
• Date you accessed the material.
• URL (if required, or for your own personal reference; MLA does not require a URL).

For instructors or editors who wish to require the use of URLs, MLA suggests that the URL appear in angle brackets after the date of access. Break URLs only after slashes.

Aristotle. Poetics. Trans. S. H. Butcher. The Internet Classics Archive. Web Atomic and Massachusetts Institute of Technology, 13 Sept. 2007. Web. 4 Nov. 2008.