Bell, D. A. (1997). Electronic instrumentation and measurements (2nd ed.). Regents/Prentice Hall; Printice Hall.
Dyfyniad Arddull ChicagoBell, David A. Electronic Instrumentation and Measurements. 2nd ed. Englewood Cliffs, N.J. : New Delhi: Regents/Prentice Hall; Printice Hall, 1997.
Dyfyniad MLABell, David A. Electronic Instrumentation and Measurements. 2nd ed. Regents/Prentice Hall; Printice Hall, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.