Atzeni, P., Ceri, S., Paraboschi, S., Torlone, R., & Ceri, S. (1999). Database systems: Consepts, languages and architectures. London: McGraw-Hill.

Atzeni, Paolo, Stephano Ceri, Stefano Paraboschi, Riccardo Torlone, and Stefano Ceri. Database Systems: Consepts, Languages and Architectures. London: McGraw-Hill, 1999.

Atzeni, Paolo, et al. Database Systems: Consepts, Languages and Architectures. London: McGraw-Hill, 1999.