Hein, L. W. (1961). An introduction to electronic data processing for business. Van Nostrand.
Cita Chicago (17th ed.)Hein, Leonard W. An Introduction to Electronic Data Processing for Business. Princeton, N. J: Van Nostrand, 1961.
Cita MLA (9th ed.)Hein, Leonard W. An Introduction to Electronic Data Processing for Business. Van Nostrand, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.