MLA

Wang, Yongsheng; Hefley, William, and William E Hefley. The Global Impact of Unconventional Shale Gas Development. Springer International Publishing, 2016.

APA

Wang, W., & Hefley, W. E. (2016). The Global Impact of Unconventional Shale Gas Development. Springer International Publishing.

Chicago

Wang, Yongsheng; Hefley, William, and William E Hefley. The Global Impact of Unconventional Shale Gas Development. : Springer International Publishing, 2016.