Burgers JS, Grol R, Klazinga NS, Mäkelä M, Zaat J (2003). “Towards evidence-based clinical practice: an international survey of 18 clinical guideline programs”. 《Int J Qual Health Care》 15 (1): 31–45. doi:10.1093/intqhc/15.1.31. PMID12630799.
Burgers JS, Grol R, Klazinga NS, Mäkelä M, Zaat J (2003). “Towards evidence-based clinical practice: an international survey of 18 clinical guideline programs”. 《Int J Qual Health Care》 15 (1): 31–45. doi:10.1093/intqhc/15.1.31. PMID12630799.