Cite Word Select your formatting style (APA, MLA, or CMS) and copy & paste the citation for trough to your bibliography/works cited page.
American Psychological Association (APA):
trough. (n.d.). WordNet 2.1. Retrieved June 24, 2008, from Word Source website: http://www.word.sc/trough
Modern Language Association (MLA):
"trough." WordNet 2.1. Princeton University. 24 Jun. 2008. <Word Source http://www.word.sc/trough>
Chicago Manual Style (CMS):
trough. Word Source. WordNet 2.1. Princeton University. http://www.word.sc/trough (accessed: June 24, 2008).
Random 
Photo
Photo