Gastrointestinal Endoscopy Clinics of North America. Cambridge University Press.
Cita Chicago (17th ed.)Gastrointestinal Endoscopy Clinics of North America. Cambridge University Press.
Cita MLA (8th ed.)Gastrointestinal Endoscopy Clinics of North America. Cambridge University Press.
Atenció: Aquestes cites poden no estar 100% correctes.