Arrange items in a logical order. For example, you might put them in order from most general to most specific. Or, you might decide it is best to put them in order from newest to oldest - or even best to worst.
At the Information Desk, ask if you are not sure about the citation format for an item. Get help from the folks at the Academic Resource Center (ARC) if you feel like you need writing tips. They are also very good at helping with the big three citation styles (APA, Chicago, MLA).