Παραπομπή APA

Claffey, W. J. (1967). Principles of data processing. Dickenson.

Παραπομπή Chicago Style

Claffey, William J. Principles of Data Processing. CAlifornia: Dickenson, 1967.

Παραπομπή MLA

Claffey, William J. Principles of Data Processing. Dickenson, 1967.