Sampson, A. (1975). The seven sisters: The great oil companies and the world they made. Hodder and Stoughton.
Citace podle Chicago (17th ed.)Sampson, Anthony. The Seven Sisters: The Great Oil Companies and the World They Made. London: Hodder and Stoughton, 1975.
Citace podle MLA (9th ed.)Sampson, Anthony. The Seven Sisters: The Great Oil Companies and the World They Made. Hodder and Stoughton, 1975.
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