What is plagiarism, and how is it different from copyright infringement?
Plagiarism is a form of academic misconduct that occurs when you represent the work and/or ideas of another person as your own, original work.
Copyright infringement is the unlawful use of work that is subject to copyright protection in a way that violates the exclusive rights of the copyright holder.
Even if a work is properly cited and credited to the original author, it can still rise to the level of copyright infringement if your use is not a fair use, or you do not have the permission of the rights-holder to use the work.
Plagiarism and copyright infringement can overlap, for example reproducing large passages of texts, verbatim, from an in-copyright work without crediting your original source, can constitute both copyright infringement and plagiarism.
Anytime you rely on a source for an idea, that source should be attributed to the original author
Changing a word or two in a sentence does not avert the need to cite the work of the original author
If a source is copied without proper attribution, it is considered plagiarism
When incorporating the in-copyright work of another into your own work, consider whether the use you are making is a Fair Use, or whether it is necessary to seek further permission from the rights-holder to use the work