Lua APA (7ú heag.)

Liwanag, R. (1999). Estrada and A.U.A.P. leaders. Manila Bulletin.

Lua i Stíl Chicago (17ú heag.)

Liwanag, Rudy. "Estrada and A.U.A.P. Leaders." Manila Bulletin 1999.

Lua MLA (9ú heag.)

Liwanag, Rudy. "Estrada and A.U.A.P. Leaders." Manila Bulletin, 1999.

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