The correct MLA in-text citation format for the book would be; (Plante 87).
The MLA in-text citation style uses the author's last name and the page number from which the quotation included in the current work was taken. An instanfe of this is; (Smith 163). However, when the source does not use page numbers, no number is included.
Parenthetical citations on the other hand immediately denote where the information comes from and hence, saves the author the trouble of having to make footnotes or endnotes.
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