Pecar, J. A., Garbin, D. A., & O'Connor, R. J. (1993). The McGraw-Hill telecommunications factbook. McGraw-Hill.
Cita Chicago (17th ed.)Pecar, Joseph A., David A. Garbin, i Roger J. O'Connor. The McGraw-Hill Telecommunications Factbook. New York: McGraw-Hill, 1993.
Cita MLA (9th ed.)Pecar, Joseph A., et al. The McGraw-Hill Telecommunications Factbook. McGraw-Hill, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.