Gaya APA

Lougheed, L. (). IELTS International English Language Testing System 2nd Edition (Ed. 2). Tangerang Selatan: Binarupa Aksara Publisher.

Gaya MLA

Lougheed, Lin. "IELTS International English Language Testing System 2nd Edition". Ed. 2 Tangerang Selatan: Binarupa Aksara Publisher, . Text.