Connolly, T. M., & Beg, C. E. (2015). Database systems: a practical approach to design, implementation, and management (Sixth edition). Pearson. https://ebookcentral.proquest.com/lib/uea/detail.action?docID=5136720
Lans, R. F. van der. (2006). Introduction to SQL: mastering the relational database language (4th ed). Addison-Wesley. https://www.oreilly.com/library/view/introduction-to-sql/0321305965/?ar