(1987). Clean coal technology: Programmes and issues. OCDE.
Chicago-čujuhus (17. p.)Clean Coal Technology: Programmes and Issues. paris: OCDE, 1987.
MLA-čujuhus (9. p.)Clean Coal Technology: Programmes and Issues. OCDE, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.