Rogers, B. (2006). Cracking the hard class: Strategies for managing the harder than average class (Second edition.). Paul Chapman.
Dyfyniad Arddull ChicagoRogers, Bill. Cracking the Hard Class: Strategies for Managing the Harder than Average Class. Second edition. London: Paul Chapman, 2006.
Dyfyniad MLARogers, Bill. Cracking the Hard Class: Strategies for Managing the Harder than Average Class. Second edition. Paul Chapman, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.