Economics

Economics uses Chicago Style.  There are 2 systems within Chicago:

Notes & Bibliography System
Use this system if you want to use footnotes. More common in arts & humanities fields.

Author/Date System
Use this system if you are mostly using in-text, parenthetical citations (not footnotes). More common in sciences and social sciences.

Quick Guide to Chicago
Gives quick examples for both systems

Not sure which system to use?
Ask your professor.

The citation guide provides links to the major style guides and provides examples of the most common types of citations.  It also has links to citation software that will help you store, take notes, and cite your sources.  The top tools are listed here as well.