Effectiveness of online marketing campaigns: An investigation into online multichannel and search engine advertising

Klapdor, Sebastion (New York: Springer, 2013) See

Apgrading toeic test taking skill. target toic. second edition

Anne, Taylor (2009) See

Building Toeic test taking skill. Starter Toeic

Anne, Taylor (2008) See

Building skill for the Toefl IBT beginning

Adam, Worcester (2009) See

Study English IELTS preparation reource book= Giáo trình luyện thi tiếng anh IELTS (Kèm theo 2 đĩa DVD)

A. Shymkiw (2007) See

Prepare For IELTS Academic practice tests= Giáo trình luyện thi tiếng anh IELTS

P. Cameron (2007) See

Oxford practice grammar with answers = Ngữ pháp Tiếng Anh

John, Eastwood (2009) See

Mastering toeic test taking skill. Toeic analyst. second edition

Anne, Taylor (2009) See

Mastering skill for the toefl ibt advanced

P. Yancey (2009) See