1. Himadri Phukan, Z. Rahman, and P. Devdutt, “Emergence of Spirituality of tourism in India” IJMT, Volume 2, Issue 4, Issn: 2249-1058, April 2012.
2. Ben Bowler(2013) in his blog How Spritiual tourism might change the world.
3. Tribe, J.(2008), The art of Tourism, Annals of Tourism Research, 35(4), 924-944.
4. Sin, H.L. (2009), Volunteer tourism- “involve Me and I will learn”, Annals of Tourism Research, 36 (3), 480-501.
5. Dr. Vinay Sharma, Dr. Rajat Aggarwal, Mr. Pramod Chandra, “Religious to Spritual Tourism Transformation Journey of Uttarakhand- Hill State in India,” Proceedings of the International Conferance on Tourism, Hospitality and Marketing, ISBN-978-1-943579-19-8, Ebene- Mauritius, 21-23 January, 2016. Paper ID: MC612.”
6. Uttarakhand Tourisam Development Board.
7. GmvLtd Yatra Office Rishikesh, Uttarakhand
8. http://uttarakhandtourism.gov.in
9. https://en.wikipedia.org/wiki/religious_tourism