Kumar,Arvind, & Nehar,Shamshun. (2007). Environmental protection. Daya Publishing House.
Chicago Edition CitationKumar,Arvind, i Nehar,Shamshun. Environmental Protection. New Delhi: Daya Publishing House, 2007.
Cita MLAKumar,Arvind, i Nehar,Shamshun. Environmental Protection. Daya Publishing House, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.