Global Environment Facility. (1993). Global monitoring of greenhouse gases including ozone: Project Document.
Chicago-referens (17:e uppl.)Global Environment Facility. Global Monitoring of Greenhouse Gases Including Ozone: Project Document. 1993.
MLA-referens (9:e uppl.)Global Environment Facility. Global Monitoring of Greenhouse Gases Including Ozone: Project Document. 1993.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.