Kumar, A., & Sudhakar, K. (2011). Energy, Environment, Ecology and Society. B S Publications An Unit of BSP Books Pvt. Ltd.
Lua i Stíl Chicago (17ú heag.)Kumar, Anil, agus K. Sudhakar. Energy, Environment, Ecology and Society. Hyderabad: B S Publications An Unit of BSP Books Pvt. Ltd, 2011.
Lua MLA (9ú heag.)Kumar, Anil, agus K. Sudhakar. Energy, Environment, Ecology and Society. B S Publications An Unit of BSP Books Pvt. Ltd, 2011.
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