Note this uses the older edition of Chicago (15th), but it does give nice examples for digital primary sources
RefWorks - Tool for Managing Citations
Use with caution. Not all citations are 100% accurate. Some miss finer details like capitalization or punctuation. Proof the final citations according to a style manual.
Manage your citations with RefWorks, a tool that allows researchers to easily import, export, search, and create automatically formatted bibliographies online. Citations found via searches in library databases such as JSTOR and many other databases can be imported directly into RefWorks. No manual typing required. Bibliographies generated within RefWorks can then be exported to Word in virtually any citation format, e.g. MLA, APA, Chicago, Turabian and others.