Groff, J. R., Weinberg, P. N., & Garcia Cordero, A. (2003). SQL: Manual de referencia. McGraw-Hill.
Chicago Style (17th ed.) CitationGroff, James R., Paul N. Weinberg, and Antonio Garcia Cordero. SQL: Manual De Referencia. Madrid: McGraw-Hill, 2003.
MLA (9th ed.) CitationGroff, James R., et al. SQL: Manual De Referencia. McGraw-Hill, 2003.
Warning: These citations may not always be 100% accurate.