APA
(2006). International handbook of virtual learning environments. Dordrecht, New York: Springer.
Chicago
2006. International handbook of virtual learning environments. Dordrecht, New York: Springer.
Harvard
(2006). International handbook of virtual learning environments. Dordrecht, New York: Springer.
MLA
International handbook of virtual learning environments. Dordrecht, New York: Springer. 2006.