Bjorn Billhardt
Brian Tracy
Kavil Ramachandran
Chris Guillebeau
Thomas L. Friedman
John C. Maxwell
Morgen Witzel
James Vlahos
Robert Greene
Richard Koch
Chip Heath , Dan Heath
Eddie Yoon
Sydney Finkelstein
Steven D. Levitt
Dirk Zeller
প্যাট্রিক ফরসেইথ
Trevor L Young
Cesare Mainardi , Paul Leinwand