Lua APA (7ú heag.)

Endriga, M. Y. (1999). ETPI, BayanTel ink interconnection agreement. Philippine Star.

Lua i Stíl Chicago (17ú heag.)

Endriga, Marigold Yao. "ETPI, BayanTel Ink Interconnection Agreement." Philippine Star 1999.

Lua MLA (9ú heag.)

Endriga, Marigold Yao. "ETPI, BayanTel Ink Interconnection Agreement." Philippine Star, 1999.

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