APA aipamena

Sewa Singh. (1997). Handbook of reference and information services. Crest Publishing House.

Chicago Style aipamena

Sewa Singh. Handbook of Reference and Information Services. New Delhi: Crest Publishing House, 1997.

MLA aipamena

Sewa Singh. Handbook of Reference and Information Services. Crest Publishing House, 1997.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.