General format for citing case studies:
Author(s). (Year). Title of case study. Number of case study. URL.
Examples:
Harvard Business School Case Study
Smith, S. (2003). Leadership. HBS No. 7-806-122. https://hbsp.harvard.edu/cases/
Ivey Business School Case Study
Heisz, M., & Leech, L. (2005). Sarbanes-Oxley Act of 2002: Understanding the requirements and the Canadian response. Ivey ID: 9B05B009. https://www.iveycases.com/
Textbook Case Study
Author(s) or editor(s) of the chapter or entry or case study. (Year of book). Title of chapter or entry or case study. In First initial. Last name, & First initial. Last name (Eds.), Title of book (pp. xx-xx). Publisher.
Example:
Pederson, S. (2008). The XYZ Group. In J. Ness, Cases in digital processing (pp.11-20). CDMA Publishing.