Resource: Professional Societies
- British Ecological Society
- Center for Responsible Travel
- Center for Sustainable Tourism
- Coastal Research and Education Society of Long Island
- EUROPARC Federation
- Global Ecotourism Network
- Global Footprint Network
- Global Sustainable Tourism Council
- Green Ideas For Tourism for Europe
- Gulf Coast Center for Ecotourism & Sustainability
- Ocean Rescue Alliance
- Oceanic Society
- Sustainable Tourism
- Sustainable Tourism Association of Hawaiʻi
- The International Ecotourism Society
- The Travel Foundation
- Travelyst
- World Tourism Organization
- World Travel & Tourism Council