World Bank & Guasch, J. L. (2007). Quality systems and standards for a competitive edge. World Bank.
Chicago-čujuhus (17. p.)World Bank juo J. Luis Guasch. Quality Systems and Standards for a Competitive Edge. Washington, D.C.: World Bank, 2007.
MLA-čujuhus (9. p.)World Bank juo J. Luis Guasch. Quality Systems and Standards for a Competitive Edge. World Bank, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.