Gaya APA

Lougheed, L. (2010). Barron's IELTS International English Language Testing System (+Audio CDs) 2nd Ed (2nd Ed). New York: Barron's Educational Series. Inc.

Gaya MLA

Lougheed, Lin. "Barron's IELTS International English Language Testing System (+Audio CDs) 2nd Ed". 2nd Ed New York: Barron's Educational Series. Inc, 2010. Teks (Text).