How's life? 2015 : measuring well-being. Paris : OECD, 2015. 263 s. Available on Internet: <http://www.oecd-ilibrary.org/economics/how-s-life-2015_how_life-2015-en> ISBN 978-92-64-21101-8. ISSN 2308-9660. [Copy count : 1, currently available 1, at library only 0]