APA (7 वां संस्करण) प्रशस्ति पत्र

Kumar, A., & Sudhakar, K. (2011). Energy, Environment, Ecology and Society. B S Publications An Unit of BSP Books Pvt. Ltd.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Kumar, Anil, और K. Sudhakar. Energy, Environment, Ecology and Society. Hyderabad: B S Publications An Unit of BSP Books Pvt. Ltd, 2011.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Kumar, Anil, और K. Sudhakar. Energy, Environment, Ecology and Society. B S Publications An Unit of BSP Books Pvt. Ltd, 2011.