APA (7th ed.) Citation

Lougheed, L. (2006). Barron's IELTS (International English Language Testing System). Barron's.

Chicago Style (17th ed.) Citation

Lougheed, Lin. Barron's IELTS (International English Language Testing System). Hauppauge, N.Y: Barron's, 2006.

MLA (9th ed.) Citation

Lougheed, Lin. Barron's IELTS (International English Language Testing System). Barron's, 2006.