Παραπομπή σε μορφή APA (7η εκδ.)

Ceballos-Lascurain, H. (1996). Tourism, ecotourism and protected areas: The state of nature-based tourism around the world and guidelines for its development. IUCN Publications.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ceballos-Lascurain, Hector. Tourism, Ecotourism and Protected Areas: The State of Nature-based Tourism Around the World and Guidelines for Its Development. Switzerland: IUCN Publications, 1996.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ceballos-Lascurain, Hector. Tourism, Ecotourism and Protected Areas: The State of Nature-based Tourism Around the World and Guidelines for Its Development. IUCN Publications, 1996.