படிமம்:DavidMcClelland.jpgDescriptionDavidMcClelland.jpg English: Picture of David McClelland Date 1 September 1997 Source Own work Author Oschult
படிமம்:David McClelland.jpgthe American psychologist David McClelland "Copyright (c) 2005 by Cruise Scientific. Permission is granted to copy, distribute and/or modify this document