http://technogerms.com/20-tutorials-to-develop-wordpress-plugins/
http://wordpress.tv/category/how-to/ <!---wordpress mentor john hawkins-->
http://www.wpbeginner.com/wp-tutorials/how-to-create-a-wordpress-plugin/
http://yudiyusti.com/code/wordpress/membuat-tabel-dengan-plugin/
http://blog.ericariyanto.com/cms/tutorial-cara-membuat-plugins-wordpress-bag-1
https://www.humayraa.com/belajar-membuat-plugin-wordpress-sederhana/
http://solislab.com/blog/plugin-activation-checklist/#register-activation-hook