APA-referens

Lougheed, L. (2012). Barron's IELTS: International English language testing system (2nd edition.). Tp.HCM: Nxb. Tổng hợp Tp.HCM.

Chicago-stil citat

Lougheed, Lin. Barron's IELTS: International English Language Testing System. 2nd edition. Tp.HCM: Nxb. Tổng hợp Tp.HCM, 2012.

MLA-referens

Lougheed, Lin. Barron's IELTS: International English Language Testing System. 2nd edition. Tp.HCM: Nxb. Tổng hợp Tp.HCM, 2012.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.