The Chicago style of formatting is approved styles of professional writing that observes a strict manner with which studies and various works of writing remain present in the forms of format and idea presentation. The important aspects of the Chicago manual include the thesis statement, in-text citations, the inclusion of footnotes, the bibliography listing. The CMS employs two styles for the citation that is either the-the notes and bibliography (NB) or the author-date (AD) system with NB style commonly used for history courses with an emphasis on the footnotes with a number assigned to the source as part of the in-text citation. The source as numbered hence has to link with reference as presented or listed on the bibliographic page. The citation