APA (7th ed.) Citation

S, F., Afonso, A. P., & Silva, M. J. (2010). Mobile Geotumba: Geographic Information Retrieval System for Mobile Devices.

Chicago Style (17th ed.) Citation

S, Freitas, A. P. Afonso, and M. J. Silva. Mobile Geotumba: Geographic Information Retrieval System for Mobile Devices. 2010.

MLA (8th ed.) Citation

S, Freitas, et al. Mobile Geotumba: Geographic Information Retrieval System for Mobile Devices. 2010.