(1997). Roberto F. de Ocampo: Personifying world class excellence in public service. Manila Bulletin.
芝加哥风格引文"Roberto F. De Ocampo: Personifying World Class Excellence in Public Service." Manila Bulletin 1997.
MLA引文"Roberto F. De Ocampo: Personifying World Class Excellence in Public Service." Manila Bulletin, 1997.
警告：这些引文格式不一定是100％准确.