Παραπομπή APA

Marks, J. (2009). IELTS resource pack: Games, activities and practice tests for IELTS preparation classes. Viva.

Παραπομπή Chicago Style

Marks, Jon. IELTS Resource Pack: Games, Activities and Practice Tests for IELTS Preparation Classes. New Delhi: Viva, 2009.

Παραπομπή MLA

Marks, Jon. IELTS Resource Pack: Games, Activities and Practice Tests for IELTS Preparation Classes. Viva, 2009.