Citazione Stile APA (7a Edizione)

Harrison, L., Snelling, R., & Travis, P. (2021). Practice tests for IELTS (First edition.). HarperCollins.

Citazione stile Chigago Style (17a edizione)

Harrison, Louis, Rhona Snelling, e Peter Travis. Practice Tests for IELTS. First edition. New York: HarperCollins, 2021.

Citatione MLA (9a ed.)

Harrison, Louis, et al. Practice Tests for IELTS. First edition. HarperCollins, 2021.