@book{231218,
	author = {Porter, Thomas. and ProQuest (Firm)},
	title = {Practical VoIP Security},
	publisher = {Syngress Publishing,},
	year = {c2006.},
	address = {Rockland, MA :},
	note = {Includes index.},
	url = {https://ebookcentral.proquest.com/lib/kuct-ebooks/detail.action?docID=254830}
}