Citação norma APA
(1997). 20th World Gas Conference 1997. Vol.2: Working Committee B. Report and Papers. Production of Manufactured Gases and Hydrogen. Production des gaz manufacturés et d´hydrogéne. International Gas Union.
Citação norma Chicago
20th World Gas Conference 1997. Vol.2: Working Committee B. Report and Papers. Production of Manufactured Gases and Hydrogen. Production Des Gaz Manufacturés Et D´hydrogéne. International Gas Union, 1997.
Citação norma MLA
20th World Gas Conference 1997. Vol.2: Working Committee B. Report and Papers. Production of Manufactured Gases and Hydrogen. Production Des Gaz Manufacturés Et D´hydrogéne. International Gas Union, 1997.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.