Contreras, V. (1997). 45,589 litterbugs caught by MMDA. Philippine Daily Inquirer.
Chicagoスタイル(17版)引用形式Contreras, Voltaire. "45,589 Litterbugs Caught by MMDA." Philippine Daily Inquirer 1997.
MLA(9版)引用形式Contreras, Voltaire. "45,589 Litterbugs Caught by MMDA." Philippine Daily Inquirer, 1997.
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