Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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