Papa, J. (2001). Composting: DOLE chief's labor of love. Philippine Daily Inquirer.
Lua i Stíl Chicago (17ú heag.)Papa, Joey. "Composting: DOLE Chief's Labor of Love." Philippine Daily Inquirer 2001.
Lua MLA (9ú heag.)Papa, Joey. "Composting: DOLE Chief's Labor of Love." Philippine Daily Inquirer, 2001.
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