Ong, P. S. (2010). The genius of Leonardo L. Co. IN Star science [column]: The people's scientist and professor. Philippine Star.
Chicago Style (17. basım) AtıfOng, Perry S. "The Genius of Leonardo L. Co. IN Star Science [column]: The People's Scientist and Professor." Philippine Star 2010.
MLA (9th ed.) AtıfOng, Perry S. "The Genius of Leonardo L. Co. IN Star Science [column]: The People's Scientist and Professor." Philippine Star, 2010.
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