Citazione Stile APA (7a Edizione)
(1997). 20th World Gas Conference 1997. Volume 11: Task Force TF 1. Report and Papers. Gas and the Environment. Gaz et environment. International Gas Union.
Citazione stile Chigago Style (17a edizione)
20th World Gas Conference 1997. Volume 11: Task Force TF 1. Report and Papers. Gas and the Environment. Gaz Et Environment. B.m.: International Gas Union, 1997.
Citatione MLA (9a ed.)
20th World Gas Conference 1997. Volume 11: Task Force TF 1. Report and Papers. Gas and the Environment. Gaz Et Environment. International Gas Union, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.