Gaya APA
ALLOWAY, B., AYRES, D. (1997).
Chemical principles of environmental pollution (2nd ed).
London:
Blackie Academic & Professional.
Gaya MLA
ALLOWAY, B.J.., AYRES, D.C..
"Chemical principles of environmental pollution".
2nd ed
London:
Blackie Academic & Professional,
1997.
Buku.