एपीए उद्धरण

Anneli Williams. (2012). Vocabulary for IELTS. Tổng hợp.

शिकागो स्टाइल उद्धरण

Anneli Williams. Vocabulary for IELTS. Tổng hợp, 2012.

एमएलए उद्धरण

Anneli Williams. Vocabulary for IELTS. Tổng hợp, 2012.