- The Consultant's Toolkit: High-Impact Questionnaires, Activities and How-to Guides for Diagnosing and Solving Client Problems
- PeopleSmart
- Active Training: A Handbook of Techniques, Designs, Case Examples, and Tips (Active Training Series)
- The Consultant's Big Book of Organization Development Tools : 50 Reproducible Intervention Tools to Help Solve Your Clients' Problems
- Active Learning: 101 Strategies to Teach Any Subject
- Anonymous
- Napoleon Hill
- Mortimer J. Adler
- Wallace D. Wattles
- Charles van Doren
- W. Clement Stone
- John J. Kirvan
- John W. Newstrom
- Edward E. Scannell
- inc. (U.S.) Overeaters Anonymous
- Barbara F. Okun
- David A. Kolb
- Peggy Carlaw
- Vasudha K. Deming
- Irwin M. Rubin
- James M. McIntyre
- Peter Renner
- Hilda Polacheck
- Hilda Satt Polachek
- Joyce S. Osland