MLA

Feng, and K. E Gray. Lost Circulation and Wellbore Strengthening. Springer International Publishing, 2018.

APA

Feng, F., & Gray, K. E. (2018). Lost Circulation and Wellbore Strengthening. Springer International Publishing.

Chicago

Feng, and K. E Gray. Lost Circulation and Wellbore Strengthening. : Springer International Publishing, 2018.