Gaya APA

webb, J, W., Reis, R, A. (1999). Programmable Logic Controllers : Principles and Applications / Fourth Edition (^a4 ^bJilid 1). USA: Prentice Hall.

Gaya MLA

webb, John, W.., Reis, Ronald, A.. "Programmable Logic Controllers : Principles and Applications / Fourth Edition". ^a4 ^bJilid 1 USA: Prentice Hall, 1999. Text.