APA (7th ed.) Citation

Sá, V., Marcos, A., & Marreiros, F. (2011). Collaborative multimodal authoring of virtual worlds.

Chicago Style (17th ed.) Citation

Sá, Vítor, Adérito Marcos, and Filipe Marreiros. Collaborative Multimodal Authoring of Virtual Worlds. 2011.

MLA (8th ed.) Citation

Sá, Vítor, et al. Collaborative Multimodal Authoring of Virtual Worlds. 2011.