Dyfyniad APA

Data Processing Management Association. (1969). Principles of automatic data processing. U.S.A: Data Processing Management Association.

Dyfyniad Arddull Chicago

Data Processing Management Association. Principles of Automatic Data Processing. U.S.A: Data Processing Management Association, 1969.

Dyfyniad MLA

Data Processing Management Association. Principles of Automatic Data Processing. U.S.A: Data Processing Management Association, 1969.

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