Beighley, L. (2007). Head first SQL. O'Reilly Media.
Lua i Stíl Chicago (17ú heag.)Beighley, Lynn. Head First SQL. Beijing ; Sebastopol, CA: O'Reilly Media, 2007.
Lua MLA (8ú heag.)Beighley, Lynn. Head First SQL. O'Reilly Media, 2007.
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