Drager, N., & Vieira, C. (2002). Trade in health services global, regional, and country perspectives (Primera edición.). Pan American Health Organization.
Lua i Stíl Chicago (17ú heag.)Drager, Nick, agus Cásar Vieira. Trade in Health Services Global, Regional, and Country Perspectives. Primera edición. Washington: Pan American Health Organization, 2002.
Lua MLA (8ú heag.)Drager, Nick, agus Cásar Vieira. Trade in Health Services Global, Regional, and Country Perspectives. Primera edición. Pan American Health Organization, 2002.
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