APA

International Asocciation of Oil & Gas Producers, . (2003). Safety performance of helicopter operations in the oil & gas industry. : .

Chicago

International Asocciation of Oil & Gas Producers, . 2003. Safety performance of helicopter operations in the oil & gas industry. : .

Harvard

International Asocciation of Oil & Gas Producers, . (2003). Safety performance of helicopter operations in the oil & gas industry. : .

MLA

International Asocciation of Oil & Gas Producers, . Safety performance of helicopter operations in the oil & gas industry. : . 2003.