International English for speakers of other languages
Smidowicz Vincent, Bloom Bridget, O'Dell FelicityKniha
Citace v seznamu literatury:
SMIDOWICZ, Vincent; BLOOM, Bridget a O'DELL, Felicity. International English for speakers of other languages. Book 5, Expert (C1) level. New updated ed. London: City & Guilds, 2010. ISBN 9780851931678.