Alvarez, H. T. (2013). Toward resource-efficient and green development. IN Commentary [column]. Philippine Daily Inquirer.
Čikaški stil citiranja (17. izdanje)Alvarez, Heherson T. "Toward Resource-efficient and Green Development. IN Commentary [column]." Philippine Daily Inquirer 2013.
MLA način citiranja (9. izdanje)Alvarez, Heherson T. "Toward Resource-efficient and Green Development. IN Commentary [column]." Philippine Daily Inquirer, 2013.
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