Παραπομπή σε μορφή APA (7η εκδ.)

Huybers Twan & Bennett Jeff. (2002). Environmental management and the competitiveness of nature-based tourism destinations. Edward Elgar Publishing.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Huybers Twan και Bennett Jeff. Environmental Management and the Competitiveness of Nature-based Tourism Destinations. Edward Elgar Publishing, 2002.

Παραπομπή σε μορφή MLA (8th εκδ.)

Huybers Twan και Bennett Jeff. Environmental Management and the Competitiveness of Nature-based Tourism Destinations. Edward Elgar Publishing, 2002.