The Research Committee reviewed the items in the bibliography and found the following four resources to be the most broadly relevant to showing the value of our work.

Donor Retention: What Do We Know and What Can We Do About It? By Adrian Sargeant (2008)
Donor Retention: What Do We Know and What Can We Do About It?

Sargeant, A., & Jay E. (2011). Building donor loyalty: The fundraiser's guide to increasing lifetime value (1st ed.).
Building donor loyalty: The fundraiser's guide to increasing lifetime value

Bernal, E. R., (2016) Beyond compliance basics: results driven stewardship.  Journal of Donor Relations & Stewardship
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To Purchase: Beyond compliance basics: results driven stewardship

Manner-McLarty (2016) A call for donor recognition strategy. Journal of Donor Relations & Stewardship
To Preview: A call for donor recognition strategy
To Purchase: A call for donor recognition strategy