Arora, P. (1996). Dictionary of environment. S. Chand & Company.
Lua i Stíl Chicago (17ú heag.)Arora, P.N. Dictionary of Environment. New Delhi: S. Chand & Company, 1996.
Lua MLA (8ú heag.)Arora, P.N. Dictionary of Environment. S. Chand & Company, 1996.
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