Plagiarism involves taking credit for another person's words, ideas or work as your own. It is considered a form of cheating and an ethical issue. Some examples of plagiarism include copying text from the internet without citation, using a paper from another class, and failing to properly cite sources when paraphrasing, quoting or summarizing another's work in an assignment. Students must cite sources using in-text citations and ensure the majority of their paper consists of their own thoughts, while only supplementing with citations. Quotes, whether used in full or part, must always be cited with the original source. Resources for learning proper citation include the MLA Handbook and writing guides from Purdue and Northwestern University.