You may encounter an article in which the author (let's say John Jones) cites another author's work (let's say George Smith) within the text. You want to Smith's words in your paper, so what do you do?? How do you cite that since it appeared in Jones' article??
According to the MLA Handbook, seventh edition, section 6.4.7, page 226:
Whenever you can, take material from the original source, not a secondhand one. Sometimes, however, only an indirect source is available--for example, someone's pubished account of another's spoken remarks. If what you quote or paraphrase is itself a quotation, put the abbreviation qtd. in [which means "quoted in"] before the indirect source you cite in your parenthetical reference.
Samuel Johnson admitted that Edmund Burke was an "extraordinary man" (qtd. in Boswell 2: 450).
Your Works Cited Page contains the citation of the source where you found the information.
Boswell, James. The Life of Johnson.
Ed. George Birkbeck Hill and L.F.
Powell. 6 vols. Oxford: Clarendon,
KnightCite is an online citation generator service provided by the Hekman Library of Calvin College.
Free (for MLA) Automatic Bibliography and Citation Generator
Citation machine helps students and professional researchers to properly credit the information that they use.
Available at the Lane Library Reference Desk.
Click on the links to access Purdue University's Online Writing Lab (OWL). It's an excellent source for formatting and citation help.
The handout below provides quick reference for using in-text citations in MLA style.