Bertrand, R. M. (1996). Programmable controller circuits. Delmar Publishers.
Cita Chicago (17th ed.)Bertrand, Roger M. Programmable Controller Circuits. Albany: Delmar Publishers, 1996.
Cita MLA (9th ed.)Bertrand, Roger M. Programmable Controller Circuits. Delmar Publishers, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.