Global Environment Facility. (1993). Global monitoring of greenhouse gases including ozone: Project Document.
Chicago-čujuhus (17. p.)Global Environment Facility. Global Monitoring of Greenhouse Gases Including Ozone: Project Document. 1993.
MLA-čujuhus (9. p.)Global Environment Facility. Global Monitoring of Greenhouse Gases Including Ozone: Project Document. 1993.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.