Answered By: Matthew [Circulation & Info Desk] Last Updated: Jan 16, 2019 Views: 252
MLA (8th edition) calls this "citing an indirect source." The source that you used would be the entry for the bibliography. In the in-text or parenthetical reference put "quoted in" before the indirect source you cite (if what you cite is a direct quote). See the MLA Handbook, section 3.4, page 124 for more information.
Mary Sutter Thomas revealed in her diary that she had "concocted the adventure" (qtd. in Peterson 79).
Note: qtd. in = quoted in