APA
,, . (1998). World resources 1998-1999 : A guide to the global environment. New Delhi: Tata Energy Research Institute.
Chicago
,, . 1998. World resources 1998-1999 : A guide to the global environment. New Delhi: Tata Energy Research Institute.
Harvard
,, . (1998). World resources 1998-1999 : A guide to the global environment. New Delhi: Tata Energy Research Institute.
MLA
,, . World resources 1998-1999 : A guide to the global environment. New Delhi: Tata Energy Research Institute. 1998.