DUECK, Jim. How political correctness weakens schools : stop losing and start winning educational excellence. Lanham, Maryland : Rowman & Littlefield, [2016]. ©2016. 1 online zdroj (x, 183 stran). Available on Internet: <http://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=1420847&lang=cs&site=eds-live&ebv=EB&ppid=pp_Cover> ISBN 978-1-4758-2988-4.