Παραπομπή σε μορφή APA (7η εκδ.)

SpringerLink (Online service), Hefley, W. E., & Wang, Y. (2015). Economics of Unconventional Shale Gas Development: Case Studies and Impacts. Springer International Publishing : Imprint: Springer.

Παραπομπή σε μορφή Chicago (17η εκδ.)

SpringerLink (Online service), William E. Hefley, και Yongsheng Wang. Economics of Unconventional Shale Gas Development: Case Studies and Impacts. Cham: Springer International Publishing : Imprint: Springer, 2015.

Παραπομπή σε μορφή MLA (8th εκδ.)

SpringerLink (Online service), et al. Economics of Unconventional Shale Gas Development: Case Studies and Impacts. Springer International Publishing : Imprint: Springer, 2015.