Seven days to confidence
2000
Willpower
2017
Develop confidence
2006
The Ultimate Book of Confidence Tricks
2003
Confidence at work
2011
Creativity at Work
2013
Selbstvertrauen in sieben Tagen. Ihr Trainingsbuch für souveränes Auftreten.
2002
Ayez confiance en vous
2006
The Complete Mind Makeover
2005
Flowers along the Grantham canal
1980
Transform Yourself
1999
Fast track to the top
2002
Future of Trust
2024
Key to the Boardroom
2001
Sustainability in practice from local to global
2009
Tự tin trong công việc
2014
