Wonnacott, Paul. Economics / Paul Wonnacott, Ronald Wonnacott. - 4th ed. - New York : Wiley, c1990. - xxix, 804 p. : col. ill. ; 27 cm. ISBN: 0471616273 LCCN: 89039541 LC Class. No.: HB171.5 .W76 1990 / .W76 1990 Dewey Class. No.: 330