Zotero is a software tool that can help you collect, manage, cite and share your citations and sources. Zotero works with word processing programs to automatically format your citations in APA. It comes in the form of a browser extension or software that lives on your desktop.
Image: Zotero.org, accessed 2015.
You will use Chicago Author-Date style to cite sources and create a bibliography. Remember to always double-check your formatting, even if you are using an automatic generator (like Zotero).
For example citations consult this Chicago Author-Date Style guide.