APA (7th ed.) Citation

Harrison, M., & Whitehead, R. (2006). IELTS practice tests: With key. Heinle Cengage Learning.

Chicago Style (17th ed.) Citation

Harrison, Mark, and Russell Whitehead. IELTS Practice Tests: With Key. London: Heinle Cengage Learning, 2006.

MLA (9th ed.) Citation

Harrison, Mark, and Russell Whitehead. IELTS Practice Tests: With Key. Heinle Cengage Learning, 2006.

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