| wttc.org | World Travel and Tourism Council |
| world-tourism.org | World Tourism Organization (wto) |
| ustoa.com | United States Tour Operators Association |
| ttra.com | Travel and Tourism Research Association |
| site-intl.org | Society of Incentive and Travel Executives |
| restaurant.org | National Restaurant Association |
| pata.org | Pacific Asia Travel Association |
| ntaonline.com | Nta | National Tour Association |
| nbta.org | National Business Travel Association |
| iacvb.org | International Association of Convention and Visitor Bureaus |
| powwowonline.com | www.powwowonline.com/ |