GREENBERG, N. (2004). Course Manual Oracle Database 10g: SQL Fundamentals I Volume III Student Guide (Additional Practices). Jobi Varghese.
Lua i Stíl Chicago (17ú heag.)GREENBERG, Nancy. Course Manual Oracle Database 10g: SQL Fundamentals I Volume III Student Guide (Additional Practices). Jobi Varghese, 2004.
Lua MLA (8ú heag.)GREENBERG, Nancy. Course Manual Oracle Database 10g: SQL Fundamentals I Volume III Student Guide (Additional Practices). Jobi Varghese, 2004.
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