Include a quote in your essay that was taken from your indirect source. Place quotation marks around the phrasing to indicate the wording came directly from another source. The quote in your essay should follow this format: "In 'A Modest Proposal,' inconsistences in the narrator's portrayal of himself indicate that he is an unreliable narrator."
Preface the quote with a signal phrase, wording that indicates the author of the quote and why that author has expertise. For example, introduce your quote with a phrase such as "According to English literature professor John Smith."
Place a parenthetical reference after the quote giving credit to the original source. Use the phrase "qtd. in" to indicate that the source you consulted was quoting another source. Follow the phrase with the last name of the author of the source you consulted and the page number the quote appeared on. You want to direct the reader to the actual book, magazine, internet article or other source where you found the quote rather than the original source. Your complete quote should appear like this: According to English literature professor John Smith, "In 'A Modest Proposal,' inconsistences in the narrator's portrayal of himself indicate he is an unreliable narrator" (qtd. in Wilson 35).
Provide citation information for the source you consulted -- not the indirect source -- on your Works Cited page. Follow rules for proper MLA format for the type of source you used, which can be found on a website such as the Purdue Online Writing Lab.