Gaya APA
Lougheed, L. (2011).
Barron's Essential Words for The IELTS (+Audio CDs) .
New York:
Barron's Educational Series. Inc.
Gaya MLA
Lougheed, Lin.
"Barron's Essential Words for The IELTS (+Audio CDs)".
New York:
Barron's Educational Series. Inc,
2011.
Teks (Text).