एपीए उद्धरण

Chhatwal, G. (1997). Encyclopaedia of environmental waste pollution. Anmol.

शिकागो स्टाइल उद्धरण

Chhatwal, G.R. Encyclopaedia of Environmental Waste Pollution. New Delhi: Anmol, 1997.

एमएलए उद्धरण

Chhatwal, G.R. Encyclopaedia of Environmental Waste Pollution. Anmol, 1997.