APA (7th ed.) Citation

Lopes, C., Cortez, P., Sousa, P., Rocha, M., & Rio, M. (2011). Symbiotic filtering for spam email detection.

Chicago Style (17th ed.) Citation

Lopes, Clotilde, Paulo Cortez, Pedro Sousa, Miguel Rocha, and Miguel Rio. Symbiotic Filtering for Spam Email Detection. 2011.

MLA (8th ed.) Citation

Lopes, Clotilde, et al. Symbiotic Filtering for Spam Email Detection. 2011.