APA (7 ম সংস্করণ) উদ্ধৃতি

Katigbak, A. F. (2003). Almost 80 percent of Pfizer's sildenafil users prefer not to take other ED medications. Philippine Star.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Katigbak, Antonio F. "Almost 80 Percent of Pfizer's Sildenafil Users Prefer Not to Take Other ED Medications." Philippine Star 2003.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Katigbak, Antonio F. "Almost 80 Percent of Pfizer's Sildenafil Users Prefer Not to Take Other ED Medications." Philippine Star, 2003.