Chicago Style Guide. The title I entered was "Harris to Goetz, 6 Apr 1925".I also filled in the author, date, location in archive, and repository fields. This section contains information on The Chicago Manual of Style (CMOS) method of document formatting and citation. Chicago has two documentation methods. The following examples illustrate the authordate system. The return address should be written in the top right-hand corner of a formal letter. The examples on this page are in the Notes-Bibliography Style. Generate Chicago citations in seconds. Start citing books, websites, journals, and more with the Citation Machine® Chicago Citation Generator.