Rewriting directly from books or sources
Copying and pasting from online sources and webpages
Buying, downloading or borrowing a paper
Incorrect paraphrasing
Incorrect use of citation and referencing
Recycling an old paper - self plagiarism
Paraphrasing means rephrasing the words of an author, putting his/her thoughts into your own words. You must still cite the original author when you are paraphrasing!
This means the sentences should be entirely in your own words. Be sure you are not just replacing or rearranging words!