Dyfyniad APA
Petruzella, F. D. (1998). Programmable logic controllers (2nd ed.). Glencoe/McGraw-Hill.
Dyfyniad Arddull Chicago
Petruzella, Frank D. Programmable Logic Controllers. 2nd ed. New York: Glencoe/McGraw-Hill, 1998.
Dyfyniad MLA
Petruzella, Frank D. Programmable Logic Controllers. 2nd ed. Glencoe/McGraw-Hill, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.