@book{20308,
	author = {Layard, P. R. G. (P. Richard G.) and Walters, A. A. (Alan Arthur)},
	title = {Micro economic theory /},
	publisher = {Mc Graw hill book co.,},
	year = {1978.},
	address = {New York :},
	note = {Includes bibliographical references and index.}
}