Mifflin. 2006. pp. 763.Advanced Learner s Dictionary. Cambridge, UK: Cambridge University Press. 2008. pp. 1380.Exams Dictionary.- Pearson Education Limited, 2006. pp.1848.Webster Dictionary. Springfield, Massachusetts: Merriam-Webster.2008. pp.780.Wordsmyth English Dictionary-Thesaurus. London, UK: Pearson Education Limited. 2008. pp.1100. Raquo; s Dictionary and Multilingual Thesaurus. Springfield, Massachusetts: Merriam-Webster.2009. pp.1036.
