Jain, R. (1994). Central Environmental 1994-95. Centax.
Cita Chicago (17th ed.)Jain, R. Central Environmental 1994-95. New Delhi: Centax, 1994.
Cita MLA (9th ed.)Jain, R. Central Environmental 1994-95. Centax, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.