Essential readings on motivation - Gambrell, Linda B.; Malloy, Jacquelynn A.; Marinak, Barbara A.; Gambrell, Linda B.; Turner, Julianne; Guthrie, John T.; Marinak, Barbara A.; Morgan, Paul L.; Fuchs, Douglas; Baumann, James F.; Edmunds, Kathryn M.; Paris, Scott G.; et al. (IRA, 2010)