What Business English books or websites would you recommend to someone who wants to learn the "Big Six" at a professional level?

I can certainly recommend Newsmart which combines news content from The Wall Street Journal, language-learning exercises and gamification (badges, points and a leaderboard). It's not for beginners, it's for professionals who want to improve their English proficiency in the workplace and learn about the key issues of business at the same time. Everyday, 6 articles about business, finance, technology and workplace culture are published in either text or video form with exercises, tips and feedback included. Because the content is updated every day, it makes learning less boring and more of a habit, like reading the news.  Newsmart has a great Learning Team behind it who also contribute their own content about the challenges of working in an English-speaking environment. For example, how to give presentations, write emails, contribute in meetings etc. Check it out: it recently launched as a website, Android and iOS app.

I agree with experts answers, thanks for the invitation. ....

You may open any of these two links at your browser;

http://nb.wsd.wednet.edu/big6/big6_resources.htm

http://www.bbc.co.uk/learning/

Hope above links can help.

I would highly recommend the following boks to study:

New nsights Into Business

Market Leader

In Company

full agree with ms. ghada                                      .

I leave the answer to the experts, specialists in this field.

Thanks for the invite and leave the answer for the professionals

Thank you for the invitation and I agree with Dr. Ghada

Thanks for the invite,

But really I do not know any resources or references relating to the question! The issue is out of my focus.