APA (7th ed.) Citation

SHYMKIW, A., & LARBALESTIER, D. (2007). Study English: IELTS preparation series one. Gramedia Pustaka Utama.

Chicago Style (17th ed.) Citation

SHYMKIW, Anna, and David LARBALESTIER. Study English: IELTS Preparation Series One. Jakarta: Gramedia Pustaka Utama, 2007.

MLA (9th ed.) Citation

SHYMKIW, Anna, and David LARBALESTIER. Study English: IELTS Preparation Series One. Gramedia Pustaka Utama, 2007.