Citations can be pain but you still need to do it! Why??
So that you can give credit where it's due. When you take someone else's work and fail to provide a citation, that is plagiarizing. You DO NOT want to do that! Think positively - how would YOU feel if someone else was using your hard work without giving you the credit!
When you provide credible sources, you show your professor that you have done your homework properly.
The following videos offer helpful information understand plagiarism and how to avoid it.
From BainBridge College