APA (7th ed.) Citation

Society of Petroleum Engineers (U.S.). (1999). Pore pressure and fracture gradients (1999 ed.). Society of Petroleum Engineers.

Chicago Style (17th ed.) Citation

Society of Petroleum Engineers (U.S.). Pore Pressure and Fracture Gradients. 1999 ed. Richardson, Tex.: Society of Petroleum Engineers, 1999.

MLA (9th ed.) Citation

Society of Petroleum Engineers (U.S.). Pore Pressure and Fracture Gradients. 1999 ed. Society of Petroleum Engineers, 1999.