Cita APA (7a ed.)

Barta, C. (2007). Ensco: The First Twenty Years: Offshore Driller Choice. Euromoney Institutional Investor PLC.

Cita Chicago Style (17a ed.)

Barta, Carolyn. Ensco: The First Twenty Years: Offshore Driller Choice. Euromoney Institutional Investor PLC, 2007.

Cita MLA (8a ed.)

Barta, Carolyn. Ensco: The First Twenty Years: Offshore Driller Choice. Euromoney Institutional Investor PLC, 2007.