Hi Noriko,
You can absolutely edit the document yourself—the middle “edit” tab (between “Read” and “History” tabs) on the Bibliography Doc will allow you to type into the document. If your citations fit underneath the categories that already exist, you can just add them in and try to include some of the tags listed (or create and list new ones). If you want to create a new category you can place that at the top and fill in the citations under your new category below, and I will go in and create the appropriate links at some point. If it is simply easier to email suggestions, that is fine, too—you can reach me at barna@umn.edu.
Let me know if you have any questions!
Alyssa