Schubert, W. (1975). Communications cables and transmission systems. Siemens Aktiengesellschaft.
Cita Chicago (17th ed.)Schubert, Werner. Communications Cables and Transmission Systems. Berlín: Siemens Aktiengesellschaft, 1975.
Cita MLA (9th ed.)Schubert, Werner. Communications Cables and Transmission Systems. Siemens Aktiengesellschaft, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.