Cita APA (7th ed.)
Kumar, H. (1998). Environmental pollution and waste management. M.D..
Cita Chicago (17th ed.)
Kumar, H.D. Environmental Pollution and Waste Management. New Delhi: M.D., 1998.
Cita MLA (9th ed.)
Kumar, H.D. Environmental Pollution and Waste Management. M.D., 1998.
Atenció: Aquestes cites poden no estar 100% correctes.