Ellet, W. (2018). The case study handbook: Student's guide (Revised edition.). Harvard Business Review Press.
Lua i Stíl Chicago (17ú heag.)Ellet, William. The Case Study Handbook: Student's Guide. Revised edition. Boston, Massachusetts: Harvard Business Review Press, 2018.
Lua MLA (9ú heag.)Ellet, William. The Case Study Handbook: Student's Guide. Revised edition. Harvard Business Review Press, 2018.
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