APA Style

Lougheed, L. (2016). Barron's the leader in the test preparation IELTS: International English language testing system 4th edition (Ed. 4). New York: Barron's.

MLA Style

Lougheed, Lin. "Barron's the leader in the test preparation IELTS: International English language testing system 4th edition". Ed. 4 New York: Barron's, 2016. Book + Audio CD.