Text ( visual ) : unmediated The spirit level : why equality is better for everyone / Richard Wilkinson and Kate Pickett. -- [New ed.]. -- : pbk. -- London : Penguin , 2010. -- xvii, 374 p. : ill. ; 20 cm. -- "First published by Allen Lane 2009. Published with revisions in Penguin Books 2010. Published with a new postscript 2010"--T.p. verso ; Includes bibliographical references and index. -- ISBN 9780241954294 ; (BB11997312) ; https://ci.nii.ac.jp/ncid/BB11997312 Author Heading(s): Wilkinson, Richard G. ; Pickett, Kate E.. -- Classification(s): DC22 : 305. -- Subject Heading(s): LCSH : Equality ; LCSH : Social problems