Green Technologies and Environmental Sustainability
  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.