APA aipamena

Sheldon, R. (2003). SQL: A beginner's guide. New York: McGraw-Hill.

Chicago Style aipamena

Sheldon, Robert. SQL: A Beginner's Guide. New York: McGraw-Hill, 2003.

MLA aipamena

Sheldon, Robert. SQL: A Beginner's Guide. New York: McGraw-Hill, 2003.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.