We have several sources for case studies:

• Sage Business Cases is a case collection that includes both original cases from Sage and cases from academic content partners such as Yale School of Management, Kellogg School of Management (Northwestern) and the University of California at Berkeley (Haas Case Series).
  • Full list of content partners
• Emerald Core Case Collection - original cases published by Emerald focusing on emerging markets.
• ABI/Inform includes cases from Thunderbird, IE Business School and MIT Sloan; MIT Sloan cases are also freely available from their website.
• Find case studies published in journals and magazines by searching for case studies as a Subject in Business Source Complete or ABI/INFORM. 
• WARC has advertising case studies by industry sector, campaign objectives and target audience.

For information about Harvard Business School (HBS) cases, see Where can I find the Harvard Business Review or Harvard Business School cases?