Lua APA (7ú heag.)

Knopkar,S.M. (2015). Environmental pollution: Monitoring & control:2 nd ed. New Age International.

Lua i Stíl Chicago (17ú heag.)

Knopkar,S.M. Environmental Pollution: Monitoring & Control:2 Nd Ed. New Delhi: New Age International, 2015.

Lua MLA (9ú heag.)

Knopkar,S.M. Environmental Pollution: Monitoring & Control:2 Nd Ed. New Age International, 2015.

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