APA

Hansen B. L., International Gas Union I., World Gas Conference (22nd. : 2003 jun 1-5 : Tokyo) & International Gas Union I.The Ormen Lange offshore gas project. : .

Chicago

Hansen Bengt Lie, International Gas Union IGU, World Gas Conference (22nd. : 2003 jun 1-5 : Tokyo) and International Gas Union IGU.The Ormen Lange offshore gas project. : .

Harvard

Hansen B. L., International Gas Union I., World Gas Conference (22nd. : 2003 jun 1-5 : Tokyo) and International Gas Union I.The Ormen Lange offshore gas project. : .

MLA

Hansen Bengt Lie, International Gas Union IGU, World Gas Conference (22nd. : 2003 jun 1-5 : Tokyo) and International Gas Union IGU.: . .