APA (7th ed.) Citation

Calì, A., Gottlob, G., Lukasiewicz, T., & Paredaens, J. (2009). A general datalog-based framework for tractable query answering over ontologies. ACM.

Chicago Style (17th ed.) Citation

Calì, A., G. Gottlob, T. Lukasiewicz, and J. Paredaens. A General Datalog-based Framework for Tractable Query Answering over Ontologies. ACM, 2009.

MLA (9th ed.) Citation

Calì, A., et al. A General Datalog-based Framework for Tractable Query Answering over Ontologies. ACM, 2009.