Gaya APA

CITY QUALITY TRENDS. (1995). AMERICA: UNEP.

Gaya Chicago

CITY QUALITY TRENDS. . AMERICA: UNEP, 1995. Text.

Gaya MLA

CITY QUALITY TRENDS. . AMERICA: UNEP, 1995. Text.

Gaya Turabian

CITY QUALITY TRENDS. AMERICA: UNEP, 1995. Print.