The MLA handbook is published by the Modern Language Association.
From the MLA website: "The ninth edition of the MLA Handbook, published in spring 2021, builds on the MLA's unique approach to documenting sources using a template of core elements—facts common to most sources, like author, title, and publication date—that allows writers to cite any type of work, from books, e-books, and journal articles in databases to song lyrics, online images, social media posts, dissertations, and more. "
MLA Handbook by From the website: The MLA Style Center is the only authorized website on MLA style. A companion to the MLA Handbook, the site provides students and educators with a host of free resources for teaching and learning the MLA’s approach to research, writing, and documentation.
OWL stands for the Online Writing Lab at Purdue University. This site is an excellent source of information for all forms of academic writing.
The BU Writing Skills Centre has placed a quick guide to MLA (9th edition) on Moodle:
There is also an example of how to cite a journal article in a paragraph: