(2011). Gerd: What is it? HealthToday Philippines.
Cita Chicago (17th ed.)"Gerd: What Is It?" HealthToday Philippines 2011.
Cita MLA (9th ed.)"Gerd: What Is It?" HealthToday Philippines, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)