USDLA & Fischler School of Education and Human Services. Distance learning: For educators, trainers, and leaders. Information Age Pub.
Chicago-referens (17:e uppl.)USDLA och Fischler School of Education and Human Services. Distance Learning: For Educators, Trainers, and Leaders. Greenwich, Conn.: Information Age Pub.
MLA-referens (9:e uppl.)USDLA och Fischler School of Education and Human Services. Distance Learning: For Educators, Trainers, and Leaders. Information Age Pub.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.