Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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