Regels trail
Inca trail trekking regulations 2008 - entrance fees, reservations and regulations
http://www.andeantravelweb.com/peru/treks/incatrail_regulations.html
Toegestane organisaties
Inca trail tour operators and travel companies in cusco peru - an independent review
http://www.andeantravelweb.com/peru/companies/peru/more_peru_tour_operators.html