APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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