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2. R.Williams. Insight Guides. Great Britain. APA Publications, 1997.
3. The Oxford Popular Thesaurus by S. Hawer Oxford University Press, Harper Collins Manufacturing 1994, 498 pp. (110, 000 Synonyms)
4. Longman Dictionary of Contemporary English. Longman, Barcelona, Spain, 2000, 1668 pp. (80,000 words)
5. Longman Dictionary of Contemporary English. Longman, Suffolk, Gr. Br., 1995, 1668 pp. (80,000 words).
6. Macmillan English Dictionary for Advanced Learners. Macmillan Education, Oxford, 2003, 1691 pp. (100,000 words)