Talley, D. (1980). Basic telephone switching systems. D. B. Taraporevala.
Cita Chicago (17th ed.)Talley, David. Basic Telephone Switching Systems. Bambay: D. B. Taraporevala, 1980.
Cita MLA (9th ed.)Talley, David. Basic Telephone Switching Systems. D. B. Taraporevala, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.