GREENBERG, N. (2013). Course Manual Oracle Database 10g: SQL Fundamentals I Volume I Student Guide. Jobi Varghese.
Chicago Style aipamenaGREENBERG, Nancy. Course Manual Oracle Database 10g: SQL Fundamentals I Volume I Student Guide. Jobi Varghese, 2013.
MLA aipamenaGREENBERG, Nancy. Course Manual Oracle Database 10g: SQL Fundamentals I Volume I Student Guide. Jobi Varghese, 2013.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.