ZIFF, Katherine K. ArtBreak : a creative guide to joyful and productive classrooms. Athens, Ohio : Swallow Press, [2016]. ©2016. 1 online zdroj (xii, 156 stran). Dostupné na internetu: <http://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=1243166&lang=cs&site=eds-live&ebv=EB&ppid=pp_Cover> ISBN 9780804040723.