APA

Gossen R., Reimer P., Nexen, International Petroleum Industry Environmental Conservation Association I., World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires), Reimer P., Nexen & International Petroleum Industry Environmental Conservation Association I.Corporate responsability in the oil and gas industry. : .

Chicago

Gossen Randy, Reimer Pierce, Nexen, International Petroleum Industry Environmental Conservation Association IPIECA, World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires), Reimer Pierce, Nexen and International Petroleum Industry Environmental Conservation Association IPIECA.Corporate responsability in the oil and gas industry. : .

Harvard

Gossen R., Reimer P., Nexen, International Petroleum Industry Environmental Conservation Association I., World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires), Reimer P., Nexen and International Petroleum Industry Environmental Conservation Association I.Corporate responsability in the oil and gas industry. : .

MLA

Gossen Randy, Reimer Pierce, Nexen, International Petroleum Industry Environmental Conservation Association IPIECA, World Energy Congress (18th. : 2001 oct. 21-25 : Buenos Aires), Reimer Pierce, Nexen and International Petroleum Industry Environmental Conservation Association IPIECA.: . .