APA
Singh R., . (2003). Handbook of environmental guidelines for Indian tourism. Kanishka, New Delhi: .
Chicago
Singh Ratandeep, . 2003. Handbook of environmental guidelines for Indian tourism. Kanishka, New Delhi: .
Harvard
Singh R., . (2003). Handbook of environmental guidelines for Indian tourism. Kanishka, New Delhi: .
MLA
Singh Ratandeep, . Handbook of environmental guidelines for Indian tourism. Kanishka, New Delhi: . 2003.