When in doubt, it's always safer to acknowledge your sources!
"Avoiding Plagiarism is easy. Simply acknowledge your sources with a citation. A citation helps others find the information you are referring to."*
Quoting VS Paraphrasing
When you include other people's words in your work, you can either directly quote the original, or you can paraphase.
*Taken from the University of Texas Arlington's online plagiarism tutorial.