APA (7th ed.) Citation

Lougheed, L. (2019). Barron's IELTS: International English Language Testing System (Fifth edition.). Barron's.

Chicago Style (17th ed.) Citation

Lougheed, Lin. Barron's IELTS: International English Language Testing System. Fifth edition. New York, NY: Barron's, 2019.

MLA (9th ed.) Citation

Lougheed, Lin. Barron's IELTS: International English Language Testing System. Fifth edition. Barron's, 2019.