Shell helps improve Philippine air quality by developing new energy sources. IN Business Lifestyle. The Philippine Star.
Chicago Style (17th ed.) Citation"Shell Helps Improve Philippine Air Quality by Developing New Energy Sources. IN Business Lifestyle." The Philippine Star .
MLA引文"Shell Helps Improve Philippine Air Quality by Developing New Energy Sources. IN Business Lifestyle." The Philippine Star, .
警告：這些引文格式不一定是100％准確.