Dyfyniad APA
Johnston, A. B., & Piscitello, D. M. (2006). Understanding Voice over IP security. Artech House.
Dyfyniad Arddull Chicago
Johnston, Alan B., and David M. Piscitello. Understanding Voice over IP Security. Boston, MA: Artech House, 2006.
Dyfyniad MLA
Johnston, Alan B., and David M. Piscitello. Understanding Voice over IP Security. Artech House, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.