APA (7th ed.) Citation

Calì, A., Gottlob, G., & Pieris, A. (2010). Query Answering under Expressive Entity−Relationship Schemata.

Chicago Style (17th ed.) Citation

Calì, A., G. Gottlob, and A. Pieris. Query Answering Under Expressive Entity−Relationship Schemata. 2010.

MLA (9th ed.) Citation

Calì, A., et al. Query Answering Under Expressive Entity−Relationship Schemata. 2010.