APA (7th ed.) Citation

Pérez-Urbina, H., Horrocks, I., Motik, B., & Bernstein, A. (2009). Efficient Query Answering for OWL 2. Springer.

Chicago Style (17th ed.) Citation

Pérez-Urbina, H., I. Horrocks, B. Motik, and A. Bernstein. Efficient Query Answering for OWL 2. Springer, 2009.

MLA (9th ed.) Citation

Pérez-Urbina, H., et al. Efficient Query Answering for OWL 2. Springer, 2009.