1. Sustainable Cruise Tourism Development Strategies—Tackling the Challenges in Itinerary Design in South-East Asia,2016
2. Cruise Industry Overview
https://www.f-cca.com/downloads/2018-Cruise-Industry-Overview-and-Statistics.pdf
3. 2019 Cruise Trends and Industry Outlook
https://cruising.org/news-and-research/-/media/CLIA/Research/CLIA-2019-State-of-the-Industry.pdf
4. Our Common Future;Brundtland,1987
5. Making Tourism More Sustainable—A Guide for Policy Makers,2005