Cita APA (7th ed.)

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.