APA (7th ed.) Citation

Clarke, D. (2007). Empires of oil: Corporate oil in Barbarian worlds. Profile Books.

Chicago Style (17th ed.) Citation

Clarke, Duncan. Empires of Oil: Corporate Oil in Barbarian Worlds. London: Profile Books, 2007.

MLA (8th ed.) Citation

Clarke, Duncan. Empires of Oil: Corporate Oil in Barbarian Worlds. Profile Books, 2007.