@book{173,
	author = {Floyd, Thomas L.},
	title = {Principles of electric circuits :},
	publisher = {Prentice Hall,},
	year = {2010.},
	address = {Boston :},
	edition = {9th ed.},
	url = {http://www.amazon.com/Principles-Electric-Circuits-Conventional-Current/dp/013507309X}
}