APA (7th ed.) Citation

Cabral, L. M., Costa, L. F., & Santos, D. (2009). Esfinge at CLEF 2007: First steps in a multiple question and multiple answer approach.

Chicago Style (17th ed.) Citation

Cabral, Luís Miguel, Luís Fernando Costa, and Diana Santos. Esfinge at CLEF 2007: First Steps in a Multiple Question and Multiple Answer Approach. 2009.

MLA (8th ed.) Citation

Cabral, Luís Miguel, et al. Esfinge at CLEF 2007: First Steps in a Multiple Question and Multiple Answer Approach. 2009.