Gaya APA
GLOBAL ENVIRONMENT QUTLOOK 3. (2002).
LONDON:
UNEP.
Gaya Chicago
GLOBAL ENVIRONMENT QUTLOOK 3.
.
LONDON:
UNEP,
2002.
Text.
Gaya MLA
GLOBAL ENVIRONMENT QUTLOOK 3.
.
LONDON:
UNEP,
2002.
Text.
Gaya Turabian
GLOBAL ENVIRONMENT QUTLOOK 3.
LONDON:
UNEP,
2002.
Print.