SCHLEICHER, Andreas. World Class : How to Build a 21st-century School System. Paris : OECD, 2018. 163 s. Strong Performers and Successful Reformers in Education. Available on Internet: <https://www.oecd-ilibrary.org/education/world-class_9789264300002-en> ISBN 978-92-64-299979. [Copy count : 1, currently available 0, at library only 1]