APA

TRIMBLE J. H., CHAPPELL D., . (1989). A VISUAL INTRODUCTION TO SQL. NEW YORK: JOHN WILEY.

Chicago

TRIMBLE J HARVEY, CHAPPELL DAVID, . 1989. A VISUAL INTRODUCTION TO SQL. NEW YORK: JOHN WILEY.

Harvard

TRIMBLE J. H., CHAPPELL D., . (1989). A VISUAL INTRODUCTION TO SQL. NEW YORK: JOHN WILEY.

MLA

TRIMBLE J HARVEY, CHAPPELL DAVID, . A VISUAL INTRODUCTION TO SQL. NEW YORK: JOHN WILEY. 1989.