Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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