Travis, P., & Harrison, L. (2013). Practice tests for IELTS. HarperCollins Publishers.
Chicago Style (17th ed.) CitationTravis, Peter, and L. Harrison. Practice Tests for IELTS. London: HarperCollins Publishers, 2013.
MLA (9th ed.) CitationTravis, Peter, and L. Harrison. Practice Tests for IELTS. HarperCollins Publishers, 2013.
Warning: These citations may not always be 100% accurate.