Harper, B. L. (1999). Why ruin perfectly good ruins?. IN Sense and sensibility [column]. Philippine Daily Inquirer.
Chicagoスタイル(17版)引用形式Harper, Bambi Lammoglia. "Why Ruin Perfectly Good Ruins?. IN Sense and Sensibility [column]." Philippine Daily Inquirer 1999.
MLA(9版)引用形式Harper, Bambi Lammoglia. "Why Ruin Perfectly Good Ruins?. IN Sense and Sensibility [column]." Philippine Daily Inquirer, 1999.
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