Cita APA (7a ed.)

Pérez−Urbina, H., Horrocks, I., & Motik, B. (2009). Efficient Query Answering for OWL 2.

Cita Chicago Style (17a ed.)

Pérez−Urbina, H., I. Horrocks, y B. Motik. Efficient Query Answering for OWL 2. 2009.

Cita MLA (9a ed.)

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