APA

International Gas Union, World Gas Conference (23rd. : 2006 jun 5-9 : Amsterdam T. N., .A Guideline "Address Increasing Difficulties to create infrastructure". : .

Chicago

International Gas Union, World Gas Conference (23rd. : 2006 jun 5-9 : Amsterdam The Netherlands), .A Guideline "Address Increasing Difficulties to create infrastructure". : .

Harvard

International Gas Union, World Gas Conference (23rd. : 2006 jun 5-9 : Amsterdam T. N., .A Guideline "Address Increasing Difficulties to create infrastructure". : .

MLA

International Gas Union, World Gas Conference (23rd. : 2006 jun 5-9 : Amsterdam The Netherlands), .: . .