Historiography is the study of what historians have written and debated about particular historical events and how they have interpreted the significance of those events. When creating a historigraphical review essay, the writer must investigate the history of how that history was written. Such an investigation should include which historians wrote the history, their methodologies, their sources, their historical or political orientation, what questions they asked, and how historians' methods and interpretations changed over time.
These resources are based on the 16th edition (2010) of the Chicago Manual of Style.
These links will give you information on citing sources according to the 7th edition of A Manual for Writers of Research Papers, Theses, and Dissertations by Kate Turabian.