Lua APA (7ú heag.)

Diaz, C. M. J. (1999). GSIS acquires 9.6% of Digitel for P 1.2 B. Philippine Star.

Lua i Stíl Chicago (17ú heag.)

Diaz, Conrado M. Jr. "GSIS Acquires 9.6% of Digitel for P 1.2 B." Philippine Star 1999.

Lua MLA (9ú heag.)

Diaz, Conrado M. Jr. "GSIS Acquires 9.6% of Digitel for P 1.2 B." Philippine Star, 1999.

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