1.
Values in nature conservation, tourism and UNESCO World Heritage Site stewardship / Janne J. Liburd and Susanne Becken
Autor:
Liburd, Janne J.
Coautor:
;
Becken, Susanne
2.
The tourism knowledge system / John Tribe, Janne J. Liburd
Autor:
Tribe, John
Coautor:
;
Liburd, Janne J.
