APA استشهاد

Kumar, A., & Nehar, S. (2007). Environmental protection. Daya Publishing House.

استشهاد بنمط شيكاغو

Kumar, Arvind, و Shamshun Nehar. Environmental Protection. Delhi: Daya Publishing House, 2007.

MLA استشهاد

Kumar, Arvind, و Shamshun Nehar. Environmental Protection. Daya Publishing House, 2007.