APA Style
Hefley, W, E., Wang, Y. (2016).
The Global Impact of Unconventional Shale Gas Development .
Springer Cham:
Springer Cham.
MLA Style
Hefley, William, E.., Wang, Yongsheng.
"The Global Impact of Unconventional Shale Gas Development".
Springer Cham:
Springer Cham,
2016.
Text.