Billig, Michael. The hidden roots of critical psychology : understanding the impact of Locke, Shaftesbury and Reid / Michael Billig. - London : SAGE, 2008 - ix, 219 p. ; 24 cm. Includes bibliographical references and index. ISBN: 9781412947237 (hbk.) 1412947235 (hbk.) Subjects--Topical Terms: Critical psychology.Psychology--History. Dewey Class. No.: 150.19809 / BIL