@book{7985,
	author = {Kaddoura, Sam, },
	title = {Echo made easy / },
	publisher = {philadelphia st louis sydney toronto, },
	year = {2009.},
	address = {New York, London : },
	edition = { second edition.},
	note = { Rev. ed. of: Echo made easy / Sam Kaddoura. 2009. 2nd ed.}
}