Multitek Indonesia | Universitas Muhammadiyah Ponorogo. Cambridge University Press.
Cita Chicago (17th ed.)Multitek Indonesia | Universitas Muhammadiyah Ponorogo. Cambridge University Press.
Cita MLA (9th ed.)Multitek Indonesia | Universitas Muhammadiyah Ponorogo. Cambridge University Press.
Atenció: Aquestes cites poden no estar 100% correctes.