Παραπομπή σε μορφή APA (7η εκδ.)

L�uck, M., & Kirstges, T. (2003). Global ecotourism policies and case studies: Perspectives and constraints. Channel View Publications.

Παραπομπή σε μορφή Chicago (17η εκδ.)

L�uck, Michael, και Torsten Kirstges. Global Ecotourism Policies and Case Studies: Perspectives and Constraints. Clevedon ; Buffalo: Channel View Publications, 2003.

Παραπομπή σε μορφή MLA (8th εκδ.)

L�uck, Michael, και Torsten Kirstges. Global Ecotourism Policies and Case Studies: Perspectives and Constraints. Channel View Publications, 2003.