APA (7th ed.) Citation

Sá, V. J., Marreiros, F., & Marcos, A. F. (2005). Collaborative multimodal authoring of virtual worlds.

Chicago Style (17th ed.) Citation

Sá, Vítor J., Filipe Marreiros, and Adérito Fernandes Marcos. Collaborative Multimodal Authoring of Virtual Worlds. 2005.

MLA (8th ed.) Citation

Sá, Vítor J., et al. Collaborative Multimodal Authoring of Virtual Worlds. 2005.