Permission is not needed to use the Neuman Systems Model for any purpose.
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Neuman, B., & Fawcett, J. (Eds.) (2011). The Neuman systems model (5th ed., [insert page number(s)]). Upper Saddle River, NJ: Pearson. Reproduced with the permission of Betty Neuman and Jacqueline Fawcett.
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Overview of the Neuman Systems Model -- PowerPoint Slides
Neuman, B. (2005). The Neuman Systems Model of Nursing [overview of the Neuman Systems Model]. Copyright permission granted for educational purposes by Dr. Betty Neuman (2005).