Nuyda, D. G. (1999). A National policy for sustainable mining. IN Seeing green [column]. Philippine Daily Inquirer.
Chicagoスタイル(17版)引用形式Nuyda, Doris G. "A National Policy for Sustainable Mining. IN Seeing Green [column]." Philippine Daily Inquirer 1999.
MLA(9版)引用形式Nuyda, Doris G. "A National Policy for Sustainable Mining. IN Seeing Green [column]." Philippine Daily Inquirer, 1999.
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