APA (7th ed.) Citation

Guetl, C., Chang, V., Kopeinik, S., Williams, R., & Auer, M. e. (2009). 3D virtual worlds as a tool for collaborative learning settings in geographically dispersed environments. International Association of Online Engineering.

Chicago Style (17th ed.) Citation

Guetl, Christian, Vanessa Chang, S. Kopeinik, Robert Williams, and Michael e. Auer. 3D Virtual Worlds as a Tool for Collaborative Learning Settings in Geographically Dispersed Environments. International Association of Online Engineering, 2009.

MLA (9th ed.) Citation

Guetl, Christian, et al. 3D Virtual Worlds as a Tool for Collaborative Learning Settings in Geographically Dispersed Environments. International Association of Online Engineering, 2009.