Gaya APA
Urban environmental indicators. (1978).
Paris:
OECD.
Gaya Chicago
Urban environmental indicators.
.
Paris:
OECD,
1978.
Text.
Gaya MLA
Urban environmental indicators.
.
Paris:
OECD,
1978.
Text.
Gaya Turabian
Urban environmental indicators.
Paris:
OECD,
1978.
Print.