Landy, Marc Karnis. American government : enduring principles, critical choices / Marc Landy, Sidney M. Milkis. - Third edition. - [Cambridge] : Cambridge University Press, 2014. - xi, 431 p. : ill. ; 24 cm. Includes bibliogr. references and index. ISBN: 9781107650022 (pbk) Subjects--Topical Terms: Politics and government--United States