APA način citiranja (7. izdanje)
Global Environmental Monitoring System. (1991). Urban air pollution. United nations environment health.
Čikaški stil citiranja (17. izdanje)
Global Environmental Monitoring System. Urban Air Pollution. Nairobi: United nations environment health, 1991.
MLA način citiranja (9. izdanje)
Global Environmental Monitoring System. Urban Air Pollution. United nations environment health, 1991.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.