Rivera, D. 3 challenges face Phl in sustainability goal. The Philippine Star.
芝加哥风格引文Rivera, Danessa. "3 Challenges Face Phl in Sustainability Goal." The Philippine Star .
MLA引文Rivera, Danessa. "3 Challenges Face Phl in Sustainability Goal." The Philippine Star, .
警告：这些引文格式不一定是100％准确.