8Kathy D. Munoz. Blackboard vs. Moodle:A Comparison of Saris faction with Online Teaching and Learning Tools [DB/OL]. http://www.humboldt.edu/-jdv 1/moodle/all.htm.
9CMS:Product Comparison System [DB/OL]. http://www.edutools.info/compare.jsp?pj =4&i=554,557,555.
10Moodle-A flee,Open Source Course Management System for Online Learning [DB/OL]. http://docs.moodle.org/en/About_Moodle.