Maragay, F. V. (2009). Drug companies defend 'voluntary compliance'. Manila Standard Today.
Chicago Style (17. basım) AtıfMaragay, Fel V. "Drug Companies Defend 'Voluntary Compliance'." Manila Standard Today 2009.
MLA (9th ed.) AtıfMaragay, Fel V. "Drug Companies Defend 'Voluntary Compliance'." Manila Standard Today, 2009.
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