APA aipamena

Beena Devi Singh. (1992). Environmental management: A geographical study of sultanpur district.

Chicago Style aipamena

Beena Devi Singh. Environmental Management: A Geographical Study of Sultanpur District. New Delhi, Deep & Deep Publications, 1992.

MLA aipamena

Beena Devi Singh. Environmental Management: A Geographical Study of Sultanpur District. 1992.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.