Cita APA (7th ed.)

Lougheed, L. (2020). Barron's IELTS (Sixth edition.). Barron's.

Cita Chicago (17th ed.)

Lougheed, Lin. Barron's IELTS. Sixth edition. New York, NY: Barron's, 2020.

Cita MLA (9th ed.)

Lougheed, Lin. Barron's IELTS. Sixth edition. Barron's, 2020.