Alloway, B. J., & Ayres, D. C. (1993). Chemical principles of environmental pollution.
Chicago Style aipamenaAlloway, B J., and D C. Ayres. Chemical Principles of Environmental Pollution. London : Blackie, 1993.
MLA aipamenaAlloway, B J., and D C. Ayres. Chemical Principles of Environmental Pollution. 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.