Plagiarism is the reproduction or paraphrasing, without acknowledgement from public or private (ie: unpublished) material (including material downloaded from the internet) attributable to, or which is the intellectual property of another including the work of students.
Pecorari, Diane. Teaching To Avoid Plagiarism : How To Promote Good Source Use. Maidenhead, Berkshire, England: McGraw-Hill Education, 2013. eBook Collection (EBSCOhost). Web. 26 Feb. 2015.