APA Citatie

Chitkara, M. (1998). Encyclopaedia of ecology, environment and pollution: Vol-xi the air (prevention and control of pollution) act, 1981 rules 1982 notifications. APH Publishing.

Chicago Style citaat

Chitkara, M.G. Encyclopaedia of Ecology, Environment and Pollution: Vol-xi the Air (prevention and Control of Pollution) Act, 1981 Rules 1982 Notifications. New Delhi: APH Publishing, 1998.

MLA citatie

Chitkara, M.G. Encyclopaedia of Ecology, Environment and Pollution: Vol-xi the Air (prevention and Control of Pollution) Act, 1981 Rules 1982 Notifications. APH Publishing, 1998.