APA
Kumar A., . (2005). Enviornmental Studies. : Delhi ,New Age Int.
Chicago
Kumar Anil, . 2005. Enviornmental Studies. : Delhi ,New Age Int.
Harvard
Kumar A., . (2005). Enviornmental Studies. : Delhi ,New Age Int.
MLA
Kumar Anil, . Enviornmental Studies. : Delhi ,New Age Int. 2005.