YouTube. Production of Ethylene | Production of Materials | iitutor.
Čikaški stil citiranja (17. izdanje)YouTube. Production of Ethylene | Production of Materials | Iitutor.
MLA način citiranja (9. izdanje)YouTube. Production of Ethylene | Production of Materials | Iitutor.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.