Clifton, H. D. (1983). Business data systems: A practical guide to systems analysis and data processing (2nd ed.). Prentice-Hall.
Chicago-referens (17:e uppl.)Clifton, Harold Dennis. Business Data Systems: A Practical Guide to Systems Analysis and Data Processing. 2nd ed. Englewood Cliffs, N.J: Prentice-Hall, 1983.
MLA-referens (9:e uppl.)Clifton, Harold Dennis. Business Data Systems: A Practical Guide to Systems Analysis and Data Processing. 2nd ed. Prentice-Hall, 1983.
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