complete documentation of joomla ,wordpress, drupal CMS

Urgently needed !! I need Complete and good documentation of customization for 3 opensource CMS : joomla ,wordpress, drupal customization would be both theme /template (create our own template/theme ) and php engine (create our own extensions, plugin ,modules, etc ) dont be such a jerk by giving me docs from [login to view URL] [login to view URL] or joomla site i need more than that !! for example if you have experience adding plugin /modules you could include it in the docs