Singh, A. K., & Hajra, P. N. (2018). Coalbed Methane in India: Opportunities, Issues and Challenges for Recovery and Utilization (1st ed. 2018.). Springer International Publishing : Imprint: Springer. https://doi.org/10.1007/978-3-319-66465-1
Παραπομπή σε μορφή Chicago (17η εκδ.)Singh, Ajay Kumar, και Partha Narayan Hajra. Coalbed Methane in India: Opportunities, Issues and Challenges for Recovery and Utilization. 1st ed. 2018. Cham: Springer International Publishing : Imprint: Springer, 2018. https://doi.org/10.1007/978-3-319-66465-1.
Παραπομπή σε μορφή MLA (8th εκδ.)Singh, Ajay Kumar, και Partha Narayan Hajra. Coalbed Methane in India: Opportunities, Issues and Challenges for Recovery and Utilization. 1st ed. 2018. Springer International Publishing : Imprint: Springer, 2018. https://doi.org/10.1007/978-3-319-66465-1.
