Gaya APA
Lougheed, L. ().
Barron's The Leader in Test Preparation IELTS International English Language Testing System (2).
Jakarta:
Binarupa Aksara.
Gaya MLA
Lougheed, Lin.
"Barron's The Leader in Test Preparation IELTS International English Language Testing System".
2
Jakarta:
Binarupa Aksara,
.
Text.