History Fair accepts either the Chicago Manual of Style (CMS) or MLA bibliographic style although CMS is preferred by historians. There are a number of online services that will do the formatting–keep in mind, they only work if the correct information has been noted at the point in which it was used! Take note cards every time research is done so that the information can be immediately noted.
The annotated bibliography should be divided between primary and secondary sources.
What are the books and online services that can be consulted for bibliographic styles?
Use Kate L. Turabian, A Manual for Writers of Term Papers, Theses, and Dissertations or Joseph Gibaldi, MLA Handbook for Writers of Research Papers.