While in college you will be asked to submit work that is your original thought. You don't need to give credit for this. You'll also be required to use the scholarship of others and use that in your own work. You must give credit to that scholarship by citing it. Using someone else's work without giving credit (even if you do it by mistake) is plagiarism. So you create a bibliography, a reference page, or a works cited page, and you place "in-text" references within your paper to let your teacher know where you found all that fantastic information. You have a lot of tools available to you to help with this process.