1. Adesunloye, D. T. and Arowosafe, F. C. (2023). Willingness of Tourists to Pay for Ecotourism Services in Selected Ecotourism Destinations in South-West, Nigeria. Journal of Applied Sciences and Environmental Management, 27 (12) 2701-2709.
2. Aman, S., Rahimi, A., Qaderi, P., Аман, С., Рахими, А. М. and Кадирик, П. (2022). Identification of Ecotourism Development Strategıes in Afghanistan, Национальная ассоциация ученых (НАУ), 85, 6-16. doi: 10.31618/NAS.2413-5291.2022.2.85.663.
3. Bagri, S., Gupta, B. and George, B. (2009). Environmental Orientation and Ecotourism Awareness Among Pilgrims, Adventure Tourists, and Leisure Tourists. Preliminary Communication, 57(1), 55-68.
4. Birleşmiş Milletler Çevre Programı Teknoloji, Sanayi ve Ekonomi Bölümü Üretim ve Tüketim Birimi (UNEP), (2024, Ocak). Ekoturizm: Sürdürülebilirliğe Yönelik İlkeler, Uygulamalar ve Politikalar, https://wedocs.unep.org/bitstream/handle/20.500.11822/9045/-Ecotourism_Principles,PracticesandPoliciesforSustainability-2002518.pdf?sequence=2#:~:text=Principles%20of%20Ecotourism,-%E2%80%A2%20Minimize%20the&text=harmony%20with%20the%20environment%2C%20minimizing,the%20natural%20and%20cultural%20environment, Erişim Tarihi: 22.01.2024.
5. Bos, W. and Tarnai, C. (1999). Content Analysis in Empirical Social Research. International Journal of Educational Research, 31, 659-671.