Gaya APA
Shymkiw, A., Larbalestier, D. (2007).
Insearch English : Study English IELTS Preparation Resource Book .
Jakarta:
Gramedia.
Gaya MLA
Shymkiw, Anna., Larbalestier, David.
"Insearch English : Study English IELTS Preparation Resource Book".
Jakarta:
Gramedia,
2007.
Text.