APA (7th ed.) Citation

Hartshorn, J. E. (1993). Oil trade: Politics and prospects. Cambridge Univ. Press.

Chicago Style (17th ed.) Citation

Hartshorn, J. E. Oil Trade: Politics and Prospects. Cambridge u.a: Cambridge Univ. Press, 1993.

MLA (9th ed.) Citation

Hartshorn, J. E. Oil Trade: Politics and Prospects. Cambridge Univ. Press, 1993.