Ellet, W. (2007). The Case Study Handbook. HBS.
Lua i Stíl Chicago (17ú heag.)Ellet, William. The Case Study Handbook. Boston: HBS, 2007.
Lua MLA (9ú heag.)Ellet, William. The Case Study Handbook. HBS, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.