APA

Lefevre P., Tozzolino P., Elf Petroleum, World Petroleum Congress (14th : 1994 : Stavanger), Tozzolino P. & Elf Petroleum.Marine environment research centre. : .

Chicago

Lefevre P, Tozzolino P, Elf Petroleum, World Petroleum Congress (14th : 1994 : Stavanger), Tozzolino P and Elf Petroleum.Marine environment research centre. : .

Harvard

Lefevre P., Tozzolino P., Elf Petroleum, World Petroleum Congress (14th : 1994 : Stavanger), Tozzolino P. and Elf Petroleum.Marine environment research centre. : .

MLA

Lefevre P, Tozzolino P, Elf Petroleum, World Petroleum Congress (14th : 1994 : Stavanger), Tozzolino P and Elf Petroleum.: . .