APA (7th ed.) Citation

Melo, D., Rodrigues, I. P., & Nogueira, V. (2011). Cooperative Question Answering Semantic Web.

Chicago Style (17th ed.) Citation

Melo, Dora, Irene Pimenta Rodrigues, and Vitor Nogueira. Cooperative Question Answering Semantic Web. 2011.

MLA (8th ed.) Citation

Melo, Dora, et al. Cooperative Question Answering Semantic Web. 2011.