Παραπομπή APA

Cullen,, P. (2008). Vocabulary for IELTS with answers. CUP.

Παραπομπή Chicago Style

Cullen,, Pauline. Vocabulary for IELTS with Answers. CUP, 2008.

Παραπομπή MLA

Cullen,, Pauline. Vocabulary for IELTS with Answers. CUP, 2008.