APA aipamena

Sinha,Swapan Kumar. (1991). Child labour in Calcutta: A sociological study. Naya Prakash.

Chicago Style aipamena

Sinha,Swapan Kumar. Child Labour in Calcutta: A Sociological Study. Culcutta: Naya Prakash, 1991.

MLA aipamena

Sinha,Swapan Kumar. Child Labour in Calcutta: A Sociological Study. Naya Prakash, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.