Haskins and Sells, firm, accountants, New York. (1957). Introduction to data processing; an outline of basic data-processing operations and methods. [s.n.].
Chicago-referens (17:e uppl.)Haskins and Sells, firm, accountants, New York. Introduction to Data Processing; an Outline of Basic Data-processing Operations and Methods. [New York: [s.n.], 1957.
MLA-referens (9:e uppl.)Haskins and Sells, firm, accountants, New York. Introduction to Data Processing; an Outline of Basic Data-processing Operations and Methods. [s.n.], 1957.
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