1. | | Autor: Carlisle, Sheena Coautor: ; Johansen, Aleksander Kunc, Martin | |
2. | | Autor: Petrova, Petia Coautor: ; Hristov, Dean | |
3. | | Autor: Pforr, Christof Coautor: ; Brueckner, Martin | |
4. | | Data Publicação: 2016 Col.autor: Tourism Development International | |
5. | | Autor: Rathnayake, Rathnayake Mudiyanselage Wasantha | |
6. | | Autor: Ping, Li Coautor: ; Ryan, Chris Cave, Jenny | |