Two pieces of information are required for the in-text (or parenthetical) reference in MLA Style:
If your source does not have page numbers (e.g. websites or other electronic material), simply list the author's name in your citation. If you do not have an author name, list the title of the source in quotation marks.
Paraphrasing a Source:
You may summarize or paraphrase the original words, thought, or idea; however, credit must be given to the source.
If you include the author's name(s) in the sentence, only the page number(s) is needed in the parenthetical reference.
In citing information from a work by two authors include both author's last names in either the signal phrase or parenthetical reference.
In citing information from a work by three authors include all author's last names in either the signal phrase or parenthetical reference.
More Than Three Authors:
If there are more than 3 authors, provide the first author's last name followed by et al. or list all the last names.
When you incorporate a direct quotation into a sentence, you must cite the source. Fit quotations within your sentences:
If the quote you are using is longer than four lines set it off from your text with a free standing block.