Upendra Nath Roy. (2005). Watershed management and sustainable deveopment. kanishka.
Chicago Style aipamenaUpendra Nath Roy. Watershed Management and Sustainable Deveopment. New Delhi: kanishka, 2005.
MLA aipamenaUpendra Nath Roy. Watershed Management and Sustainable Deveopment. kanishka, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.