1. Adventure Travel News. (2010, June 10). Brazilian Adventure Tourism Association matures, contributes to growth in segment, advances professionalism in sustainability & safety. https://www.adventuretravelnews.com/brazilian-adventure-tourism-association-matures-contributes-to-growth-in-segment-advances-professionalism-in-sustainability-safety
2. Adventure Travel Trade Association. (2020). Adventure travel overview and market sizing. ATTA. https://www.adventuretravel.biz/research/adventure-travel-overview-and-market-sizing
3. Adventure Travel Trade Association. (2021a). Adventure travel trends snapshot report. ATTA. https://www.adventuretravelnews.com/overview-of-attas-2020-adventure-travel-trends-snapshot-report
4. Adventure Travel Trade Association. (2021b). Adventure travel and trade association guidelines. ATTA. https://www.adventuretravel.biz/COVID19guidelines/
5. Arnould, J. (2015). Man transcends man. Public Books. https://www.publicbooks.org/the-history-and-philosophy-of-adventure/