Ong, E. D. (2002). RP's language advantage slowly slipping away, notes call center leader. Manila Bulletin.
Chicagoスタイル(17版)引用形式Ong, Edison Dy. "RP's Language Advantage Slowly Slipping Away, Notes Call Center Leader." Manila Bulletin 2002.
MLA(9版)引用形式Ong, Edison Dy. "RP's Language Advantage Slowly Slipping Away, Notes Call Center Leader." Manila Bulletin, 2002.
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