APA Style

Lougheed, L. (2014). Barron's IELTS : international English language testing system, 4th ed. (4th ed.). New York: Barrons Educational Series.

MLA Style

Lougheed, Lin. "Barron's IELTS : international English language testing system, 4th ed.". 4th ed. New York: Barrons Educational Series, 2014. Text.