機構名稱                                          網址

World Tourism Organization (WTO)             http://www.world-tourism.org/

World Travel & Tourism Council                  http://www.wttc.org/

National Park Service                                    http://www.nps.gov/

International Association of Convention       http://www.destinationmarketing.org/

& Visitor Bureaus

The American Society of Travel Agents       http://astanet.com/

The EnviroLink Network                              http://www.envirolink.org/

International Union for Conservation           http://www.iucn.org/

of Nature and Natural Resources(IUCN)