| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Hotel Sustainable Development: Principles & Best Practices | 978-0-86612-378-5 (0-86612-378-4) | 2011 | A. J. Singh · PhD · Herve Houdre |
| Hotel Sustainable Development: Principles and Best Practices with Answer Sheet | 978-0-13-314446-8 (0-13-314446-1) | 2013 | A. J. Singh · American Hotel & Lodging Association |