Pratt, P. J. (1995). A guide to SQL: Instructor's manual with test item file and transparency masters. Boyd & Fraser Pub.
Citazione stile Chigago Style (17a edizione)Pratt, Philip J. A Guide to SQL: Instructor's Manual with Test Item File and Transparency Masters. Danvers, Massachussetts: Boyd & Fraser Pub, 1995.
Citatione MLA (9a ed.)Pratt, Philip J. A Guide to SQL: Instructor's Manual with Test Item File and Transparency Masters. Boyd & Fraser Pub, 1995.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.