Boland, R. G. A. (1993). General environmental management. Sterling publishers Private Limited.
Chicago Style (17th ed.) ZitazioaBoland, R. G. A. General Environmental Management. New Delhi: Sterling publishers Private Limited, 1993.
MLA (9th ed.) ZitazioaBoland, R. G. A. General Environmental Management. Sterling publishers Private Limited, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.