(1971). Pétrole. Paris: La Documentation.
Trích dẫn kiểu ChicagoPétrole. Paris: La Documentation, 1971.
MLA CitationPétrole. Paris: La Documentation, 1971.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.
(1971). Pétrole. Paris: La Documentation.
Trích dẫn kiểu ChicagoPétrole. Paris: La Documentation, 1971.
MLA CitationPétrole. Paris: La Documentation, 1971.