APA (7th ed.) Citation

Prolo, C., Quaresma, P., Vieira, R., Rodrigues, I. P., & Salgueiro, P. (2012). A Question-Answering System for Portuguese.

Chicago Style (17th ed.) Citation

Prolo, Carlos, Paulo Quaresma, Renata Vieira, Irene Pimenta Rodrigues, and Pedro Salgueiro. A Question-Answering System for Portuguese. 2012.

MLA (8th ed.) Citation

Prolo, Carlos, et al. A Question-Answering System for Portuguese. 2012.