APA (7th ed.) Citation

Willigers, B. J. A., Begg, S., & Bratvold, R. B. (2016). Appraising Unconventional Resources: How Many Wells To Drill and Where To Place Them? SPE Reservoir Evaluation & Engineering, 19(2), 340. https://doi.org/10.2118/179736-PA

Chicago Style (17th ed.) Citation

Willigers, Bart J. A., Steve Begg, and Reidar B. Bratvold. "Appraising Unconventional Resources: How Many Wells To Drill and Where To Place Them?" SPE Reservoir Evaluation & Engineering 19, no. 2 (2016): 340. https://doi.org/10.2118/179736-PA.

MLA (9th ed.) Citation

Willigers, Bart J. A., et al. "Appraising Unconventional Resources: How Many Wells To Drill and Where To Place Them?" SPE Reservoir Evaluation & Engineering, vol. 19, no. 2, 2016, p. 340, https://doi.org/10.2118/179736-PA.