APA
(2011). DNV report: Trapped drill pipe caused Macondo BOP failure. : .
Chicago
2011. DNV report: Trapped drill pipe caused Macondo BOP failure. : .
Harvard
(2011). DNV report: Trapped drill pipe caused Macondo BOP failure. : .
MLA
DNV report: Trapped drill pipe caused Macondo BOP failure. : . 2011.