(1989). OECD economic surveys: Belgium Luxembourg. Organisation for Economic Co-Operation and Development.
Chicago-čujuhus (17. p.)OECD Economic Surveys: Belgium Luxembourg. Paris, France: Organisation for Economic Co-Operation and Development, 1989.
MLA-čujuhus (9. p.)OECD Economic Surveys: Belgium Luxembourg. Organisation for Economic Co-Operation and Development, 1989.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.