Punay, E. (2004). Pia Cayetano, brothers take oaths of office at Companeros tomb. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Punay, Eduardo. "Pia Cayetano, Brothers Take Oaths of Office at Companeros Tomb." Philippine Star 2004.
Lua MLA (9ú heag.)Punay, Eduardo. "Pia Cayetano, Brothers Take Oaths of Office at Companeros Tomb." Philippine Star, 2004.
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