Philippine News Agency. (2019). Abra teen to show off enviro-robot in Australia. Manila Bulletin.
Chicagoスタイル(17版)引用形式Philippine News Agency. "Abra Teen to Show off Enviro-robot in Australia." Manila Bulletin 2019.
MLA(9版)引用形式Philippine News Agency. "Abra Teen to Show off Enviro-robot in Australia." Manila Bulletin, 2019.
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