| Keep It Real - Market and communicate your green credentials | | Dr Xavier Font and Laura Higa, Leeds Beckett University | 2015 |
| Key energy efficiency solutions for SME hotels | | Hotel Energy Solutions | 2011 |
| Key energy efficiency technologies database for SME hotels | | Hotel Energy Solutions | 2011 |
| Practical guide for pilot hotel owners | | Sustainable Innovation AB, Nigel Claridge | 2016 |
| Survival of the fittest - Sustainable tourism means business | | Forum for the Future and the Travel Foundation | 2012 |
| Sustainability in tourism "A guide through the label jungle" | | Diego Núñez, Herbert Hamele (ECOTRANS) | 2016 |
| Sustainable tourism for development Guidebook | | World Tourism Organization (UNWTO) | 2013 |
| The Plastics Reduction Guide for Hotels | | Travel Without Plastic | |
