Communicator Sphere | Universitas Bhayangkara Surabaya. Cambridge University Press.
Cita Chicago (17th ed.)Communicator Sphere | Universitas Bhayangkara Surabaya. Cambridge University Press.
Cita MLA (8th ed.)Communicator Sphere | Universitas Bhayangkara Surabaya. Cambridge University Press.
Atenció: Aquestes cites poden no estar 100% correctes.