APA aipamena

Jakeman, V. (2008). Cambridge step up to ielts. HCM.: Tổng hợp.

Chicago Style aipamena

Jakeman, Vanessa. Cambridge Step Up to Ielts. HCM.: Tổng hợp, 2008.

MLA aipamena

Jakeman, Vanessa. Cambridge Step Up to Ielts. HCM.: Tổng hợp, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.