Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.