APA (7th ed.) Citation

Singh, O. P. (2006). Environment and natural resources: Ecological and economic perspectives. Regency Publications.

Chicago Style (17th ed.) Citation

Singh, O. P. Environment and Natural Resources: Ecological and Economic Perspectives. New Delhi: Regency Publications, 2006.

MLA (9th ed.) Citation

Singh, O. P. Environment and Natural Resources: Ecological and Economic Perspectives. Regency Publications, 2006.

Warning: These citations may not always be 100% accurate.