Chemical Safety and Hazard Investigation Board. [Valero refinery asphyxiation incident].
Čikaški stil citiranja (17. izdanje)Chemical Safety and Hazard Investigation Board. [Valero Refinery Asphyxiation Incident].
MLA način citiranja (9. izdanje)Chemical Safety and Hazard Investigation Board. [Valero Refinery Asphyxiation Incident].
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