APA (7th ed.) Citation

Harrison & Whitehead. (2006). IELTS practice tests. Thomson.

Chicago Style (17th ed.) Citation

Harrison and Whitehead. IELTS Practice Tests. London: Thomson, 2006.

MLA (8th ed.) Citation

Harrison and Whitehead. IELTS Practice Tests. Thomson, 2006.

Warning: These citations may not always be 100% accurate.