Gaya APA
Müller, D. (2013).
Design Characteristics of Virtual Learning Environments .
Springer Fachmedien Wiesbaden:
Springer Gabler.
Gaya MLA
Müller, Daniel.
"Design Characteristics of Virtual Learning Environments".
Springer Fachmedien Wiesbaden:
Springer Gabler,
2013.
E-Book.