APA (7th ed.) Zitazioa

Trivedy, R. (1990). River pollution in India. Ashish.

Chicago Style (17th ed.) Zitazioa

Trivedy, R.K. River Pollution in India. New Delhi: Ashish, 1990.

MLA (9th ed.) Zitazioa

Trivedy, R.K. River Pollution in India. Ashish, 1990.