Answer: City Libraries
Explanation;
The American Institute of CPAs Not-for-Profit Guide is meant to help Not-for-Profit organizations prepare their financial statements in such a way that they can incorporate the unique aspects of their organization.
Not-for-Profit organizations are private in nature so this guide is mostly for private organizations. City Libraries on the other hand are Government owned and as such will use Government type accounting methods not the AICPA's Not-for-Profit Guide.