Chemical Safety and Hazard Investigation Board. [Valero refinery asphyxiation incident].
Citazione stile Chigago Style (17a edizione)Chemical Safety and Hazard Investigation Board. [Valero Refinery Asphyxiation Incident].
Citatione MLA (9a ed.)Chemical Safety and Hazard Investigation Board. [Valero Refinery Asphyxiation Incident].
Attenzione: Queste citazioni potrebbero non essere precise al 100%.