APA (7 वां संस्करण) प्रशस्ति पत्र

Shekhar, S. (2017). Environmental impact assessment (EIA) and environmental clearance (EC) at ONGC, western onshore basin, vadodara. Forest Research Institute.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Shekhar, Shashank. Environmental Impact Assessment (EIA) and Environmental Clearance (EC) at ONGC, Western Onshore Basin, Vadodara. Dehradun: Forest Research Institute, 2017.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Shekhar, Shashank. Environmental Impact Assessment (EIA) and Environmental Clearance (EC) at ONGC, Western Onshore Basin, Vadodara. Forest Research Institute, 2017.

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