Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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