Projects can last for months or years, and it is easy to lose track of which piece of information came from which source. It can be a challenge to have to reconstruct half of your citations in the scramble at the end of the project! Your future self may not remember everything that seems obvious in the present, so it is important to take clear notes about your sources.
Reference management software helps you keep track of your citations as you work, and partially automates the process of constructing bibliographies when it is time to publish.
Your departmental librarian will be able to help you pick the right format for references and will probably know about some useful search and management tools that you have not used before. Feel free to ask him/her for advice.
Additionally, your college librarian is also a very good resource and is there to help.