Gaya APA
Environmental threats : perception, analysis and management. (1989).
London:
Belhaven.
Gaya Chicago
Environmental threats : perception, analysis and management.
text.
London:
Belhaven,
1989.
Tesis.
Gaya MLA
Environmental threats : perception, analysis and management.
text.
London:
Belhaven,
1989.
Tesis.
Gaya Turabian
Environmental threats : perception, analysis and management.
London:
Belhaven,
1989.
Tesis.