Cita APA

Travis, P., & Harrison, L. (2013). Practice tests for IELTS. HarperCollins Publishers.

Citación estilo Chicago

Travis, Peter, and L. Harrison. Practice Tests for IELTS. London: HarperCollins Publishers, 2013.

Cita MLA

Travis, Peter, and L. Harrison. Practice Tests for IELTS. HarperCollins Publishers, 2013.

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