APA (7th ed.) Citation

Lantican, R. M. (2007). Coal-the most plentiful but dirtiest energy source. IN Educators speak [column]. Manila Bulletin.

Chicago Style (17th ed.) Citation

Lantican, Ricardo M. "Coal-the Most Plentiful but Dirtiest Energy Source. IN Educators Speak [column]." Manila Bulletin 2007.

MLA (9th ed.) Citation

Lantican, Ricardo M. "Coal-the Most Plentiful but Dirtiest Energy Source. IN Educators Speak [column]." Manila Bulletin, 2007.