Ortego, K. (1997). For 1997: The climate change issue. [column]. Manila Bulletin.
Chicago Style (17th ed.) CitationOrtego, Kitch. "For 1997: The Climate Change Issue. [column]." Manila Bulletin 1997.
MLA (9th ed.) CitationOrtego, Kitch. "For 1997: The Climate Change Issue. [column]." Manila Bulletin, 1997.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.