APA

Henry P., Gaz de France, World Petroleum Congress (13th. : 1991 : Buenos Aires) & Gaz de France.Chemical conversion of natural gas. : .

Chicago

Henry Pierre, Gaz de France, World Petroleum Congress (13th. : 1991 : Buenos Aires) and Gaz de France.Chemical conversion of natural gas. : .

Harvard

Henry P., Gaz de France, World Petroleum Congress (13th. : 1991 : Buenos Aires) and Gaz de France.Chemical conversion of natural gas. : .

MLA

Henry Pierre, Gaz de France, World Petroleum Congress (13th. : 1991 : Buenos Aires) and Gaz de France.: . .