Welford, R. (1999). Corporate environmental management: Systems and strategies. Universities Press.
Chicago Style aipamenaWelford, Richard. Corporate Environmental Management: Systems and Strategies. Hyderabad: Universities Press, 1999.
MLA aipamenaWelford, Richard. Corporate Environmental Management: Systems and Strategies. Universities Press, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.