Eitemau Tebyg: How to write, speak, and think more effectively / Ruidolf Flesch
- How to Write Plain English : A Book for Lawyers and Consumers /
- EFFECTIVE SPEAKING
- Effective Writing : Writing Skills for Intermediate Students of American English : Students's Book /
- Writing and Speaking in the Technology Professions : A Practical Guide /
- Teaching Writing in Chinese Speaking Areas /
- Learn to Speak English /