APA-čujuhus (7. p.)
ebrary, Inc, & Douwe, K. G. (2010). Clean coal. Nova Science Publishers, Inc..
Chicago-čujuhus (17. p.)
ebrary, Inc, juo Klaes G. Douwe. Clean Coal. New York: Nova Science Publishers, Inc., 2010.
MLA-čujuhus (9. p.)
ebrary, Inc, juo Klaes G. Douwe. Clean Coal. Nova Science Publishers, Inc., 2010.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.