APA (7th ed.) Citation

Guetl, C., Chang, V., & Auer, M. (2008). Ecosystem-based theoretical models for learning in environments of the 21st century. Kassel University.

Chicago Style (17th ed.) Citation

Guetl, C., Vanessa Chang, and Michael Auer. Ecosystem-based Theoretical Models for Learning in Environments of the 21st Century. Kassel University, 2008.

MLA (9th ed.) Citation

Guetl, C., et al. Ecosystem-based Theoretical Models for Learning in Environments of the 21st Century. Kassel University, 2008.