Crisostomo, S. (2012). Pfizer says product recall only due to incorrect declaration. Philippine Star.
Chicago (17e ed.) BronvermeldingCrisostomo, Sheila. "Pfizer Says Product Recall Only Due to Incorrect Declaration." Philippine Star 2012.
MLA (9e ed.) BronvermeldingCrisostomo, Sheila. "Pfizer Says Product Recall Only Due to Incorrect Declaration." Philippine Star, 2012.
Let op: Deze citaties zijn niet altijd 100% accuraat.