The University of Ulster Plagiarism Policy (2012) defines plagiarism as:
"...the act of taking or copying someone else’s work, including another student’s, and presenting it as if it were one’s own...Plagiarism also occurs where a student’s own work is re-presented without being properly referenced. Plagiarism is a form of cheating and is a disciplinary offence."
You can find the Plagiarism Policy on the A-Z list of University Policies.
Below are some textbooks on referencing and plagiarism. Always check your Course Handbook for the specific referencing style recommended for your course.
It is extremely important to acknowledge all of the sources that you have used to support your work. This helps to distinguish between your ideas and other people's ideas, and ensures that you avoid any possibility of unintended plagiarism. Plagiarism is therefore seen as a form of cheating. Have a look at the links below, which explain what plagiarism IS and tips on how to avoid it.