Saintika Medika | Universitas Muhammadiyah Malang. Cambridge University Press.
Cita Chicago (17th ed.)Saintika Medika | Universitas Muhammadiyah Malang. Cambridge University Press.
Cita MLA (8th ed.)Saintika Medika | Universitas Muhammadiyah Malang. Cambridge University Press.
Atenció: Aquestes cites poden no estar 100% correctes.