Cita APA (7th ed.)

Sampson, A. (1975). The seven sisters: The great oil companies and the world they made. Hodder and Stoughton.

Cita Chicago (17th ed.)

Sampson, Anthony. The Seven Sisters: The Great Oil Companies and the World They Made. London: Hodder and Stoughton, 1975.

Cita MLA (9th ed.)

Sampson, Anthony. The Seven Sisters: The Great Oil Companies and the World They Made. Hodder and Stoughton, 1975.

Atenció: Aquestes cites poden no estar 100% correctes.