de leon, Franz. Online course management: University Virtual Learning Environment. University of the Philippines Diliman.
Chicago-referens (17:e uppl.)de leon, Franz. Online Course Management: University Virtual Learning Environment. Quezon City: University of the Philippines Diliman.
MLA-referens (9:e uppl.)de leon, Franz. Online Course Management: University Virtual Learning Environment. University of the Philippines Diliman.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.