Rivero, A. Caltex launches Techron Concentrate for diesel engines. The Philippine Star.
芝加哥风格引文Rivero, Angel. "Caltex Launches Techron Concentrate for Diesel Engines." The Philippine Star .
MLA引文Rivero, Angel. "Caltex Launches Techron Concentrate for Diesel Engines." The Philippine Star, .
警告：这些引文格式不一定是100％准确.