- http://zawaruddin.blogspot.com/2011/03/impor-file-excel-xls-dengan-codeigniter.html
- http://copascode.wordpress.com/2013/02/21/import-dari-excel-ke-database-menggunakan-phpexcel-pada-codeigniter/
- http://rizki.info/2014/01/02/import-data-dari-microsoft-excel-ke-dalam-mysql-dengan-phpexcel-dan-codeigniter/