Kumar,Arvind, & Nehar,Shamshun. (2007). Environmental protection. Daya Publishing House.
Stile di citazione ChicagoKumar,Arvind, e Nehar,Shamshun. Environmental Protection. New Delhi: Daya Publishing House, 2007.
Citazione MLAKumar,Arvind, e Nehar,Shamshun. Environmental Protection. Daya Publishing House, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.