If you are not yet using a citation management software, it may be a good ideas to start. BGSU offers all students the ability to use RefWorks. While not a requirement, using RefWorks can not only help with organize sources, but help with citations as well. The below LibGuide can help you get started.
Chicago Manual of Style is the preferred citation style for the discipline of history. For the most up to date information, you should refer to the Chicago Manual of Style Online.
This is just a short introduction to the resources available to help you cite. For more indepth help, visit the Chicago Manual of Style LibGuide:
There is a chance your professor may ask you to use APA citation style. Visit the below guide for help.