Sigma Thet Tau International Honor Society of Nursing defines evidence-based nursing (EBN) as "an integration of the best evidence available, nursing expertise, and the values and preferences of the individuals, families and communities who are served. This assumes that optimal nursing care is provided when nurses and health care decision-makers have access to a synthesis of the latest research, a consensus of expert opinion, and are thus able to exercise their judgment as they plan and provide care that takes into account cultural and personal values and preferences. This approach to nursing care bridges the gap between the best evidence available and the most appropriate nursing care of individuals, groups and populations with varied needs".

Agency for Healthcare Research & Quality (AHRQ)
Cochrane Collaboration
Centre for Health Evidence
Evidence Report Topics from EBP Centers
Community Preventive Services
Academic Center for Evidence-Based Nursing
Also see- National Institute of Nursing Research