www.aptistutor.comhttp://ibis.atwebpages.com/aptis/https://aptisweb.com/aptis-exam-library/aptis-for-teachershttps://www.youtube.com/watch?v=kHWz8j7jpM0http://www.usf.edu.lb/files/usf_files_20190829052517.pdfhttps://www.abaenglish.com/en/english-certificates/aptis/