Cita APA (7a ed.)

Simpson, C. D. (1994). Programmable logic controllers. Regents-Prentice-Hall.

Cita Chicago Style (17a ed.)

Simpson, Colin D. Programmable Logic Controllers. Englewood Cliffs, New Jersey: Regents-Prentice-Hall, 1994.

Cita MLA (9a ed.)

Simpson, Colin D. Programmable Logic Controllers. Regents-Prentice-Hall, 1994.