Krishnamoorthy Bala. (2017). Environmental Management (3rd.). PHI.
Chicago Style aipamenaKrishnamoorthy Bala. Environmental Management. 3rd. Delhi: PHI, 2017.
MLA aipamenaKrishnamoorthy Bala. Environmental Management. 3rd. PHI, 2017.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.