In brief: If you are using the exact wording from another source, even if it only a few words, be sure to put the wording in quotes (Quoting). If you are using your own words (Paraphrasing) , but the ideas or information is from a source, give credit to the source.
Cite not only to give credit to your source, but also to credit your research. Citing also gives your reader a way to go back to the original source material.
There are three major styles for citing: MLAl, APA and CHICAGO. Check with your instructor to see which style is preferred. If you can choose the style for citing, the key is to be consistent.
Pay attention to databases and online sources which help you cite Here is the icon in Business Source Complete