Internal Time: Chronotypes, Social Jet Lag, and Why You're So Tired
| Country | USA | 
| Binding | Kindle Edition | 
| EISBN | 9781847653727 | 
| Format | Kindle eBook | 
| Label | Profile Books | 
| Manufacturer | Profile Books | 
| NumberOfPages | 292 | 
| PublicationDate | 2011-09-30 | 
| Publisher | Profile Books | 
| ReleaseDate | 2011-09-30 | 
| Studio | Profile Books |