Katigbak, A. F. (2004). New asthma formulation for infants as young as 6 months old unveiled: Asthma is one of the most common chronic childhood diseases. Philippine Star.
Chicago-referens (17:e uppl.)Katigbak, Antonio F. "New Asthma Formulation for Infants as Young as 6 Months Old Unveiled: Asthma Is One of the Most Common Chronic Childhood Diseases." Philippine Star 2004.
MLA-referens (9:e uppl.)Katigbak, Antonio F. "New Asthma Formulation for Infants as Young as 6 Months Old Unveiled: Asthma Is One of the Most Common Chronic Childhood Diseases." Philippine Star, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.