Cita APA (7th ed.)
Nas, S., & Gala, D. M. (2012). Underbalanced drilling. Society of Petroleum Engineers.
Cita Chicago (17th ed.)
Nas, Steve, i Deepak M. Gala. Underbalanced Drilling. Richardson, TX: Society of Petroleum Engineers, 2012.
Cita MLA (9th ed.)
Nas, Steve, i Deepak M. Gala. Underbalanced Drilling. Society of Petroleum Engineers, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.