APA aipamena

Gupta, A. Billion is enough: India's population problem a way out. 2001.

Chicago Style aipamena

Gupta, Ashok. Billion Is Enough: India's Population Problem a Way Out. New Delhi: 2001.

MLA aipamena

Gupta, Ashok. Billion Is Enough: India's Population Problem a Way Out. 2001.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.