Lewis, G. (2000). Test your aptitude and ability. Hodder & Stoughton.
Lua i Stíl Chicago (17ú heag.)Lewis, Gareth. Test Your Aptitude and Ability. London: Hodder & Stoughton, 2000.
Lua MLA (8ú heag.)Lewis, Gareth. Test Your Aptitude and Ability. Hodder & Stoughton, 2000.
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