(1992). Environmental problems: Prospects and constraints. Anmol Pub.
Cita Chicago (17th ed.)Environmental Problems: Prospects and Constraints. New Delhi: Anmol Pub, 1992.
Cita MLA (9th ed.)Environmental Problems: Prospects and Constraints. Anmol Pub, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.