how to cite an essay in a book

In-Text Citation (Quotation) – entry that appears in the body of your paper after a direct quote.
The following format will be used:

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Gupta, Sanjay. “Balancing and Checking.” Essays on Modern Democracy, edited by Bob Towsky, Brook Stone Publishers, 1996, pp. 36-48. Essay Database, www.databaseforessays.org/modern/modern-democracy.

Two formatting styles are used in academic writing: Modern Language Association and the American Psychological Association. The two styles largely require the same information for a book citation, though the order in which it is listed differs. Citing an article within a book requires a slight adjustment to the basic book entry.
For MLA citations, the format for the bibliography citation of an article within a book is as follows: Last name, First. “Title of Article.” Name of Book. City of Publication: Publisher, year of publication. Page numbers of article. When citing the article in text, simply put the author and page number in parenthesis: (Wood 4). If you have already referred to the author in the sentence, such as saying “According to Wood,” omit the author’s name in the parenthetical citation and just list the page number. For APA citations, the format for the bibliography citation is: Last name, First. (Year of publication). Title of Article. In Name of Book (article pages). City of Publication: Publisher. The in-text citation would be: (Author, Year of Publication, p. Page Number), such as (Wood, 2014, p. 4).

References:

http://www.easybib.com/reference/guide/mla/essay
http://education.seattlepi.com/cite-article-within-book-6857.html
http://www.wikihow.com/Cite-a-Book