It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
From Dr. Cloud's instructions:
Select "Browse" > "Browse by Discipline" > "Nursing Theory"
Select "Nursing Theories and Nursing Practice" by Marlaine Smith
Go to the Table of Contents—many of the more contemporary theories are located in Section VI: Middle Range Theories.