Chicago Manual of Style
The Chicago Manual of Style (CMOS) is comprised of two systems:
1. Author-date
2. Notes and bibliography
You will use the notes and bibliography system. See the CMOS Quick Guide to get started.
Remember that the citations that can be autogenerated in the library catalog and various databases are generally of poor quality.
Zotero
Zotero (pronounced "zoh-TAIR-oh") is an application that collects, manages, and cites research sources. It's easy to use, connects with your web browser to download sources, and best of all it's free.
Zotero allows you to attach PDFs, notes and images to your citations, organize them into collections for different projects, and create bibliographies.