Dul, J. (2008). Case study methodology in business: Research. Elsevier.
Chicago-čujuhus (17. p.)Dul, Jan. Case Study Methodology in Business: Research. Amsterdam: Elsevier, 2008.
MLA-čujuhus (9. p.)Dul, Jan. Case Study Methodology in Business: Research. Elsevier, 2008.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.