For an overview of caring for patients with dementia:
Dementia, Care of Patient.  In:  Lippincott’s Nursing Procedures and Skills.
Provides overview with references to the literature for care of the patient with dementia.  Also includes a list of additional references that you may find helpful.

For guidelines
Alzheimer disease and Dememtia with Lewy Bodies.  In:  DynaMed.
Go to the Guidelines and Resources Section in each of these entries to see a list of US guidelines. Also, the Treatment Sections include reviews of evidence for management strategies, such as diet, as well as medical therapy.

Reviewed and updated 4/30/2014 ldt