Lua APA (7ú heag.)

Perez, D. (1998). No law on bottled water. Manila Bulletin.

Lua i Stíl Chicago (17ú heag.)

Perez, Delfin. "No Law on Bottled Water." Manila Bulletin 1998.

Lua MLA (9ú heag.)

Perez, Delfin. "No Law on Bottled Water." Manila Bulletin, 1998.

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