Kumar. (2007). Industrial Sociology (6 ed.). Lakshmi Narain Agarwal.
Chicago Style aipamenaKumar. Industrial Sociology. 6 ed. Agra: Lakshmi Narain Agarwal, 2007.
MLA aipamenaKumar. Industrial Sociology. 6 ed. Lakshmi Narain Agarwal, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.