Gaya APA

LOUGHEED, L. (2021). BARRON'S IELTS : ESSENTIAL WORDS (ED. 4). AMERIKA SERIKAT: KAPLAN NORTH AMERICA.

Gaya MLA

LOUGHEED, LIN. "BARRON'S IELTS : ESSENTIAL WORDS". ED. 4 AMERIKA SERIKAT: KAPLAN NORTH AMERICA, 2021. Text.