MLA

Singh, Ritu; Kumar, Sanjeev, and Sanjeev Kumar. Green Technologies and Environmental Sustainability. Cham: Springer International Publishing, 2017.

APA

Singh, S., & Kumar, S. (2017). Green Technologies and Environmental Sustainability. Cham: Springer International Publishing.

Chicago

Singh, Ritu; Kumar, Sanjeev, and Sanjeev Kumar. Green Technologies and Environmental Sustainability. Cham: Springer International Publishing, 2017.