Drew, C. H., Duivenboden, J. v., & Bonnefoy, X. (2000). Environmental health services in Europe 5: Guidelines for evaluation of environmental health services. World Health Organization, Regional Office for Europe.

Drew, Christina H., Jaco van Duivenboden, and Xavier Bonnefoy. Environmental Health Services in Europe 5: Guidelines for Evaluation of Environmental Health Services. Copenhagen, [Denmark]: World Health Organization, Regional Office for Europe, 2000.

Drew, Christina H., et al. Environmental Health Services in Europe 5: Guidelines for Evaluation of Environmental Health Services. World Health Organization, Regional Office for Europe, 2000.