Rogers, B. (2006). Cracking the hard class: Strategies for managing the harder than average class (Second edition.). Paul Chapman.
Chicago-referens (17:e uppl.)Rogers, Bill. Cracking the Hard Class: Strategies for Managing the Harder than Average Class. Second edition. London: Paul Chapman, 2006.
MLA-referens (8:e uppl.)Rogers, Bill. Cracking the Hard Class: Strategies for Managing the Harder than Average Class. Second edition. Paul Chapman, 2006.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.