Citazione Stile APA (7a Edizione)
(1997). 20th World Gas Conference 1997. Volume 7: Working Committee G. Report and Papers. Information and Communication. Information et communication. International Gas Union.
Citazione stile Chigago Style (17a edizione)
20th World Gas Conference 1997. Volume 7: Working Committee G. Report and Papers. Information and Communication. Information Et Communication. B.m.: International Gas Union, 1997.
Citatione MLA (9a ed.)
20th World Gas Conference 1997. Volume 7: Working Committee G. Report and Papers. Information and Communication. Information Et Communication. International Gas Union, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.