Gaya APA

Lougheed, L. (2020). BARRON'S: The Trusted name in Test Prep (IELTS) (Ed.6). Amerika Serikat: Kaplan North America.

Gaya MLA

Lougheed, Lin. "BARRON'S: The Trusted name in Test Prep (IELTS)". Ed.6 Amerika Serikat: Kaplan North America, 2020. Text.