Cita APA (7th ed.)

Crispin, A. J. (1997). Programmable logic controllers and their engineering applications (2nd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Crispin, Alan J. Programmable Logic Controllers and Their Engineering Applications. 2nd ed. London: McGraw-Hill, 1997.

Cita MLA (8th ed.)

Crispin, Alan J. Programmable Logic Controllers and Their Engineering Applications. 2nd ed. McGraw-Hill, 1997.