| 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 |